I have a completely different experience. I regularly use my 2018 12.9 Pro when on the road. It is my meeting notebook; a great device for reviewing and updating documents; and can be used to run two windows at the same time in a usable way, especially when paired with a good physical keyboard.
It isn’t a full replacement for my laptop, but that is more due to limits the app developers apply rather than any fundamental limit within iPadOS or the hardware. If Microsoft made their iOS apps feature-matched to the desktop apps then I could ditch the laptop completely.
Now, I know that there will be people who are coders or have other needs that there is no app available to do what they do. That’s cool, the iPad isn’t going to replace their laptop or desktop. But for many people it will do everything they need.
Exactly this. Microsoft went down the wrong path imo when they slapped a desktop system onto a tablet with the Surface and I think they realized that somewhat and pivoted more towards notebooks. The touch UI is done much much better on iPad (and the tablet mode on Win8, but MS chickened out after people complained). The iPad's limitations also hits the sweet spot for a lot of users who don't use technology for all that much except photos, videos, music, and the internet.