There is a reason why even in 2020, a game from 2004 still has a massive community surrounding it.

San Andreas at times can definitely feel outdated but to this day it's nothing short of brilliant. Even at the standard $20 AUD it's worth it, there is issues that require fixing but a little research should do the trick, silent's patch, widescreen fix for example. Even in 2020 the multiplayer mods for the game, San Andreas Multiplayer and Multi Theft Auto still boast massive player counts, I highly recommend playing the multiplayer mod, it has something for everyone, I've spent well over 10,000 hours playing San Andreas mostly because of the multiplayer mods.

The base game alone is great and it could not be filled with anymore content and attention to detail, it's great in it's own right but modding this game brings it to a whole new level, it's almost like the rule34 of modding, think of anything you could've want modded into the game and I can almost guarantee you it's there.