Opposite opinion. I have the Huawei trifold, and it's by far my favorite phone I've ever used. I'm typing this on that phone right now, half-unfolded to square mode.

I don't care that it is a few mm thicker than other phones when it's in my pocket. It's so much better than a regular phone for everything from reading books to writing email to watching YouTube, and it's also a slightly thicker regular phone. It also has a pretty good UI for moving apps to side-by-side mode, which I use so often that I'm 100% sure I will never go back to a regular phone.