Resolving the jelly by only rotating the screen simply means the jelly then shows when using it in landscape mode... which is a common way to use it for many things- such as web browsing... which is a common point of complaint when one sees jelly.
I own the 6 and see jelly... but don't care. Hopefully besides just rotating the screen, the screen quality actually improves as well.
Bring on the 7. My next upgrade will probably be the 9 or 10 in about 2029-30 or so. My last hop was from 2 to 6. A great thing about Mini is that it has LONG USE LEGS. Since Apple releases one and then leaves it as THE one for a few years, it doesn't seem to suffer from the "long in tooth" effect that impacts iPhones with new models rolling out every year. Funny how that works like that.