I’ll chime in again. I don’t do photo or video editing at all. I also have the iPad Pro 12.9” M1 and have had zero issues with performance, slowdown. We (M1 owners) are at the mercy of app/game developers to optimize for the chipset and also for Apple to release OS updates that will utilize the hardware. But, at this point, nearly 3 years later I don’t see that happening.
Still games may run better on the newer M-chip line, but they still don’t come to console gaming with the same visual fidelity.
Even with photo and video editing, when I had my M1 iPad Pro 12.9," it had no issues or slowdown with it. I'm not much into gaming apart from emulating a few older childhood 80s and 90s games - which also is no issue for any iPad, really. What really started heating up and slowing down my M1 iPP was using on-device photo generating apps.
For the last few years before I got my MacBook Air, I was using my iPP 12.9" (2020 and 2021 models) as my only computer. Every year, they'd release improved software and operating system, but it's still being very held back. I finally gave up and bought an M2 MBA. I miss using iPadOS for a lot of things (dedicated streaming apps, Fitness+, banking apps, FaceID, drawing and handwriting, etc), but it's a lot more practical to me to use a desktop OS right now as I can still access most of those things I listed, but also have the ability to use legacy programs, programming, etc without connecting to a service like Shadow PC or a local PC. (The reason I don't have both is because I find most of my usage very redundant between the two machines. Even my iPhone can do 99% of what I use my MacBook for).
The number one complaint I see about the iPad mostly online is how limited the OS is. On the other hand, everyone I know offline who has an iPad is completely happy with it just how it is - a larger version of their iPhone. There's ways for them to upgrade the user experience to make everyone happy, they just won't as it will affect MacBook sales, probably.
After 3 years of having an M1 iPad available, I'm hoping one of these years we see an iPadOS-renaissance of sorts, I just wouldn't get my hopes up.