Being able to connect an NPC to a specific ID would help in terms of server development. 
Let's say my server has 100 player slots and I would like another 100 npc's, I would rather have them connected in slots 100-199 than being mixed in with regular players.

By having NPC's in higher slots, I can reduce Player Information array sizes to the appropriate size to only include players, meanwhile I could create NPC specific arrays that handle NPC-Specific information.

Good one suggestion 👍👍

I thought NPCs were already allocated from MAX_PLAYERS down.

(2020-04-18, 11:23 AM)Y_Less Wrote: I thought NPCs were already allocated from MAX_PLAYERS down.

Unfortunately that's not the case in SA-MP. They get assigned from ID 0 upwards. Quite messy when players get mixed in-between NPC slots.
I do like the idea of assigning them from MAX_PLAYERS down though.

(2020-04-18, 11:23 AM)Y_Less Wrote: I thought NPCs were already allocated from MAX_PLAYERS down.

That's an FCNPC feature.