In this scam’s case, I’d say purely marketing wank so they could say it uses latest. For Satisfactory, I’m sure they mostly just don’t want their code base to fall behind before they’re even out of Early Access.

Same as any library/framework upgrade in code: if you don’t upgrade, you will not eventually get any new features/security updates/asset etc. If you have stopped development, then no point, but if you plan for support game for longer period, it makes sense. Also in the future if UE 7 brings something awesome, upgrade from UE5->UE7 is much harder than two simpler version upgrades.

And ofc this thing is clear scam, so this was just in general