This is only speculation on my part, but it makes no sense to buy FiveM this late into the game’s lifecycle and not use the existing system for the next game. At the very least, if significant changes need to be made, there’s already a framework there to build on. If they shut down FiveM with the release of GTA6, that’s just opening the door for someone else to build a new system to replace it.

But I don’t run a corporation and am not exclusively motivated by short-term profits.