Am I worried about the M1, nope… it’s just an A14X, Apple arnt new to making A??X chips.
The screen tech, yeah I am a little worried with all the production issue rumours floating around, but that’s something only time will tell.
If I think of it though, a lot of products have early adopter issues:
iPhone 4 had the death grip, iPhone 5 had iPhones chipped out of the box, iPhone 6 Plus has the bend gate issue, iPad Pro 2018 also had a bend gate issue, the iPhone X (new OLED display) had touch issues due to a failcomponent.
Will the new iPad Pro have issues with the display, history tells us it definitely could do, but it is either buy this or wait until late next year for the 6th Gen which will probably have the M2 and be thinner… but then it will be a question of whether it might throttle or overheat due to it being thinner… unfortunately all tech will have issues, I just hope they have nailed the XDR display for these iPads.
Personally I doubt apple would go with miniLED over OLED if it was likely to have an increased risk of issues especially with miniLED being harder and more expensive to produce over OLED.