Grand Theft Auto V Enhanced (Free for current owners)

Yeah, I'm curious about what is with that. Maybe so the versions don't get confused before release

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.

Still no confirmation, but Epic does not have pre-load functionality, so the enhanced edition might just show up as a new game on the launch day. Rockstar not naming Epic in the announcement is a bit concerning though, I hope it won't be a delayed launch, or worse, no free enhanced edition for epic gta V owners (due to it being given free before)

Currently there's both "Grand Theft Auto V" and "Grand Theft Auto V Enhanced" on Epic library.
Only "Grand Theft Auto V Enhanced" shows up on the store.

you get new online features that were ps5 exclusive

I saw that too. Free up 25GB for other games and take the performance hit on a RTX2060, or leave as is ... decisions, decisions, decisions.

Maybe they enhanced file compression.

It hasn't even been released yet so yes, it isn't compatible. That is why they are keeping the Legacy version, they mention it is mainly for FiveM or whatever that mod that makes GTA RP, till they update the files for the Enhanced edition, but that do recognise there are a lot of other mods so keeping Legacy operation for a fair while it seems.

its automatical

Beginning today, you can also preemptively migrate your Story Mode progress to the new version, directly from the Pause Menu inside GTAV Legacy on PC. Please note, you can update the Story Mode Save Game uploaded to Rockstar Games multiple times — overwriting the previously uploaded Save Game each time — but you can only migrate it to GTAV Enhanced once, and while you will be able to continue playing from where you left off in GTAV Legacy, progress cannot be copied back.
On March 4, once the free upgrade is available, you'll be able to migrate your Story Mode progress and GTA Online character progress from within GTAV Enhanced. The GTA Online transfer is also a one-time migration that does not delete your GTAV Legacy progress, but it cannot be reversed, and includes any Characters, GTA$, Progression, Stats, Vehicles, Properties, Weapons, Clothing, and Player-Created Jobs.
Players on PlayStation 4 or Xbox One can still only migrate Story Mode and Online progress to PlayStation 5 or Xbox Series X|S. Profiles cannot be migrated between PlayStation or Xbox console families and PC.

Transfer of save files doesn't seem to have a time-limit, and from the looks of their comments about keeping Legacy around for a fair while you should be safe.

Me too. Also everything does definitely load faster.