The only time the bug fixes are really prioritised is when the given bug affects a high number of players, and or makes the game unplayable. The bug fix for the Father Winter situation was pushed out very quickly because it was a Very Big Deal, for instance. So I suspect those kinds of bug, at least, if they crop up, will be fixed before TS5 (which I expect around 2023-2024), but the smaller ones that are just annoying are unlikely to be fixed.
Given what we've heard about TS5 so far, in that they seem to be leaning very multi-player/online function moving forward, I may not be playing it either way. It depends on the execution of it. Truthfully I think the Sims community is too diverse to peaceably work together on something truly multi-player, but that's me.
Anyway, I digress. I expect TS4 to be saddled forever with as many bugs as TS2 and TS3, and modders to pick up the slack. This is why I don't ever get the game on console and would never. I need mods to adjust the game to how I want to play and help with the bugs I experience.
