So you spend $40 bucks to play Control: Ultimate Edition on Switch. You're totally fine with having a Cloud-based experience, and you're enjoying your time with the game. That's all well and good...but there's something to keep in mind. You may not always have access to Control: Ultimate Edition. At one point it could just vanish.
You're not really buying a copy of Control on the Switch, as you're instead by access to it. Since it's a Cloud version of the game, that access could disappear at some point. Obviously that's not the plan and players should be able to enjoy the game for years to come, but the eShop page does warn that service could end at some point. That said, you will get 6 months advance notice of that. Good to know you'll get a heads up, but still sucky that you could spend $40 to never access a game again.