I give myself a Christmas present and upgrade my 11' 2018 iPad pro 1TB Cellular to the 11' M1 2TB Cellular version and wow, so far I'm very impress with the RAM (Most reason why I upgraded) So far, no apps or Safari tabs loaded and I have 2 games in the background, 10+ Safari tabs and many other apps open since yesterday. Normally, my 2 games automatically reload if I just make a more extensive Safari browsing/or Safari tabs automatically reloaded if I play games for more than 15-20 mins. For everyday usage like overall speed for browsing or open apps I honestly notice almost no difference between this and my 2018 one, but for those like me who use their iPad more than casually and need multi-tasking, the RAM boost is definitively worth the upgrade cost, at least for me.
And for those wondering why I didn't buy the 12,9 for the Mini-LED, I tried to love the 12,9 in the past because I'm a big screen lover guy, but for my usage, the 12,9 is just uncomfortable to use (I use ny iPad 95% of the time in hand) and the 11' is the perfect size/portability/weight for me. If I really need to use a keyboard, I have my iMac for that.