For me, it's entirely ended my tablet use, and now rarely reach for a laptop. I still have a desktop with two large screens, but I don't feel a need for anything in between any more.

The screen is big enough for me that given it's always in my pocket it's far more convenient to grab my phone than getting up to grab my tablet or laptop.

What are you doing on your fold device that works as well on a tablet but not a phone?