Agreed, the last time I used an iPad was a 2018 12.9" Pro (pre M chips). There's zero lag and compute heavy tasks (like stem splitting in Logic or video rendering in Lumafusion) are very quick. It's not just the chip either, the significant improvements to pixel response times thanks to OLED makes panning arounds Maps (for example) feel really smooth. The fact it's so thin and light (I moved to 11") contributes to the experience too, it's not just an aesthetic difference because it means I can comfortably hold the iPad above my head with one hand.
It's a great device. I was considering returning mine but I think I'll keep it. I got cellular and the 11" model for the first time so it's lightweight, portable, fast (M4), and always connected. I'm thinking about picking up the Magic Keyboard tomorrow to try that out.
