Obsolete the PROXMOVE flag and uses

code/modules/assembly/holder.dm

@@ -3,7 +3,6 @@
 	icon = 'icons/obj/assemblies/new_assemblies.dmi'
 	icon_state = "holder"
 	item_state = "assembly"
-	flags = PROXMOVE
 	throwforce = 5
 	w_class = ITEMSIZE_SMALL
 	throw_speed = 3
@@ -64,11 +63,18 @@
 		else
 			. += "\The [src] can be attached!"
 
-/obj/item/device/assembly_holder/HasProximity(atom/movable/AM as mob|obj)
+/obj/item/device/assembly_holder/Moved(atom/old_loc, direction, forced = FALSE)
+	. = ..()
+	if(isturf(old_loc))
+		unsense_proximity(callback = .HasProximity, center = old_loc)
+	if(isturf(loc))
+		sense_proximity(callback = .HasProximity)
+
+/obj/item/device/assembly_holder/HasProximity(turf/T, atom/movable/AM, old_loc)
 	if(a_left)
-		a_left.HasProximity(AM)
+		a_left.HasProximity(T, AM, old_loc)
 	if(a_right)
-		a_right.HasProximity(AM)
+		a_right.HasProximity(T, AM, old_loc)
 
 /obj/item/device/assembly_holder/Crossed(atom/movable/AM as mob|obj)
 	if(AM.is_incorporeal())

code/modules/assembly/proximity.dm

@@ -4,7 +4,6 @@
 	icon_state = "prox"
 	origin_tech = list(TECH_MAGNET = 1)
 	matter = list(DEFAULT_WALL_MATERIAL = 800, "glass" = 200, "waste" = 50)
-	flags = PROXMOVE
 	wires = WIRE_PULSE
 
 	secured = 0
@@ -33,7 +32,7 @@
 	update_icon()
 	return secured
 
-/obj/item/device/assembly/prox_sensor/HasProximity(atom/movable/AM as mob|obj)
+/obj/item/device/assembly/prox_sensor/HasProximity(turf/T, atom/movable/AM, old_loc)
 	if(!istype(AM))
 		log_debug("DEBUG: HasProximity called with [AM] on [src] ([usr]).")
 		return
@@ -90,6 +89,10 @@
 
 /obj/item/device/assembly/prox_sensor/Moved(atom/old_loc, direction, forced = FALSE)
 	. = ..()
+	if(isturf(old_loc))
+		unsense_proximity(range = range, callback = .HasProximity, center = old_loc)
+	if(isturf(loc))
+		sense_proximity(range = range, callback = .HasProximity)
 	sense()
 
 /obj/item/device/assembly/prox_sensor/interact(mob/user as mob)//TODO: Change this to the wires thingy

code/modules/hydroponics/spreading/spreading.dm

@@ -72,8 +72,9 @@
 	var/obj/machinery/portable_atmospherics/hydroponics/soil/invisible/plant
 
 /obj/effect/plant/Destroy()
-	if(plant_controller)
-		plant_controller.remove_plant(src)
+	if(seed.get_trait(TRAIT_SPREAD)==2)
+		unsense_proximity(callback = .HasProximity, center = get_turf(src))
+	plant_controller.remove_plant(src)
 	for(var/obj/effect/plant/neighbor in range(1,src))
 		plant_controller.add_plant(neighbor)
 	return ..()
@@ -106,6 +107,7 @@
 	name = seed.display_name
 	max_health = round(seed.get_trait(TRAIT_ENDURANCE)/2)
 	if(seed.get_trait(TRAIT_SPREAD)==2)
+		sense_proximity(callback = .HasProximity) // Grabby
 		max_growth = VINE_GROWTH_STAGES
 		growth_threshold = max_health/VINE_GROWTH_STAGES
 		icon = 'icons/obj/hydroponics_vines.dmi'

code/modules/hydroponics/spreading/spreading_response.dm

@@ -1,4 +1,4 @@
-/obj/effect/plant/HasProximity(var/atom/movable/AM)
+/obj/effect/plant/HasProximity(turf/T, atom/movable/AM, old_loc)
 
 	if(!is_mature() || seed.get_trait(TRAIT_SPREAD) != 2)
 		return
@@ -13,6 +13,14 @@
 		spawn(1)
 			entangle(M)
 
+/obj/effect/plant/Moved(atom/old_loc, direction, forced = FALSE)
+	. = ..()
+	if(seed.get_trait(TRAIT_SPREAD)==2)
+		if(isturf(old_loc))
+			unsense_proximity(callback = .HasProximity, center = old_loc)
+		if(isturf(loc))
+			sense_proximity(callback = .HasProximity)
+
 /obj/effect/plant/attack_hand(var/mob/user)
 	manual_unbuckle(user)
 

code/modules/mob/living/carbon/human/species/xenomorphs/alien_facehugger.dm

@@ -15,7 +15,6 @@ var/const/MAX_ACTIVE_TIME = 400
 	icon_state = "facehugger"
 	item_state = "facehugger"
 	w_class = 3 //note: can be picked up by aliens unlike most other items of w_class below 4
-	flags = PROXMOVE
 	body_parts_covered = FACE|EYES
 	throw_range = 5
 

code/modules/mob/mob_defines.dm

@@ -3,7 +3,6 @@
 	layer = MOB_LAYER
 	plane = MOB_PLANE
 	animate_movement = 2
-	flags = PROXMOVE
 	var/datum/mind/mind
 
 	var/stat = 0 //Whether a mob is alive or dead. TODO: Move this to living - Nodrak

code/modules/power/singularity/containment_field.dm

@@ -10,12 +10,15 @@
 	unacidable = 1
 	use_power = USE_POWER_OFF
 	light_range = 4
-	flags = PROXMOVE
 	var/obj/machinery/field_generator/FG1 = null
 	var/obj/machinery/field_generator/FG2 = null
 	var/hasShocked = 0 //Used to add a delay between shocks. In some cases this used to crash servers by spawning hundreds of sparks every second.
 
+/obj/machinery/containment_field/Initialize()
+	sense_proximity(callback = .HasProximity)
+
 /obj/machinery/containment_field/Destroy()
+	unsense_proximity(callback = .HasProximity)
 	if(FG1 && !FG1.clean_up)
 		FG1.cleanup()
 	if(FG2 && !FG2.clean_up)
@@ -33,7 +36,7 @@
 /obj/machinery/containment_field/ex_act(severity)
 	return 0
 
-/obj/machinery/containment_field/HasProximity(atom/movable/AM as mob|obj)
+/obj/machinery/containment_field/HasProximity(turf/T, atom/movable/AM, old_loc)
 	if(istype(AM,/mob/living/silicon) && prob(40))
 		shock(AM)
 		return 1
@@ -42,8 +45,6 @@
 		return 1
 	return 0
 
-
-
 /obj/machinery/containment_field/shock(mob/living/user as mob)
 	if(hasShocked)
 		return 0