It isn't for me and $3,000 for a fancy phone/tablet is insane. This is such a luxury item I would never finance it for 2 years at $130 a month, yes it's zero interest, but still has to be paid off. I'm close to my max on the folds pricing as it is..
Ive been using folds since the fold 2 and the crease has never been a issue while reading anything. The only time it's a issue visually is looking at it from an angle. It's gotten better every year and the fold 8 is rumored to be better also.
The fold 7 form is perfect for a phone/tablet. It's thin, it opens to a small tablet when you want. I have no interest in going bigger, if I need bigger, I'm home and have a 12 inch screen tablet to use.
Me not buying one or wanting one has nothing to do with I haven't tried it. I haven't tried it because I have zero interest in it. To me the trifold is over kill. I'm glad you like it since you bought one, I'm sure it's neat, just not for me and others.