Umm.. it's one of those things you have to experience it for yourself. Because as Fold user for 2 years... the primary appeal is the bigger screen. And most people criticize the crease... but I personally don't have a huge problem, is it a negative? Absolutely. But I find the positives outweigh the negatives.
True, it's thicker when closed. Obviously, the bigger the real estate on a device... the better. But you have to take into account portability as well. 7-8" is the sweet spot and anything larger than that, you are sacrificing portability at that point.
I am not knocking anyone who has a folding phone or likes them. I can see the reasons why people like them.
I am talking personally as I would totally obsess over the crease and scratches to the display. If they can develop either a very scratch resistant plastic or a bendable glass and there was no crease it would peak my interest a lot more.
For me until they can get the price down and the screen durability, scratch resistance and crease improved I will be skipping. However if I was gifted such a device or got one in some crazy trade deal I might reconsider.
At the end of the day choice is good and if you enjoy it and it works for you that is all that matters!
I get what you are saying about portability but what I am saying is for me to have a folding phone replace my tablet like the s8 I would want a larger screen. So for me it would never be able to replace my tablet and there are a lot of drawbacks in my opinion to the design at least for now.
You are right though if I had one in my hand my opinion might change because I would probably just like such a different type of device.