One reason I’ll stay with Mini 5 is the 3.5mm line output. It’s an old beaten down argument but bluetooth audio has latency which does not work for precise monitoring. That’s my story and I’m sticking to it.
iPadOS 15 needs to be simplified but more capable. iPadOS 14 was the first version that I felt that I needed a book and study to figure it out. And then it was still not easy or intuitive.
If Apple brings their pro apps to iPad Pro this would never work. Logic Pro would be dead in the water running in a 5 gig environment (no pun intended).