Grand Theft Auto V Enhanced (Free for current owners)

I believe so. Probably some lighting corrections, DLLS and other modern integrations. I think it would push me to pick it up again and play it. Also, you can't play online with those that don't own this Enhanced version.

PC SUPPORT

Support for the previous version of GTAV will continue, allowing anyone whose hardware does not currently meet the minimum requirements of the new upgrade to keep playing. This also ensures that support for FiveM will continue uninterrupted while we work to extend support for it on the upgraded version.

Please note that to maintain this support, the original version of GTA Online on PC will be a separate instance, and players who remain on that version will not be able to play in sessions together with those on the upgraded version. PC Players who want to play with each other will need to ensure they’re playing the same version of the game. Both versions will be available to everyone who upgrades — and first-time purchasers will get access to both versions as well.

🤔This?

Same story as with every other proprietary launcher. Platform clients of Steam or Epic are inconsequential and just additional hassle for users. Rockstar launcher must be opened where you have to authenticate and only after this step you'll be able to launch the actual game.