Original GTA SA was built for 4:3 monitors. The patch ensures the HUD isn't stretched and the FOV looks natural on 1080p and 4K displays.
The GTA SA Hoodlum 10 Patched may have been a nuisance for Rockstar and the GTA community, but it also highlighted the creativity and resourcefulness of gamers. The exploit demonstrated that, with determination and skill, gamers could push the boundaries of what was possible in a game.
Players trying to run an unpatched Hoodlum 1.0 executable on modern systems regularly face devastating bugs: