ipadOS is no longer a touch-only interface ... I have the latest iPad Pro with Apple's keyboard+touch pad and also the pencil ... it combines the best of all worlds. Using the iPad became for me a nice mix of keyboard/touchpad/finger/pen ... same could be true for macOS
I have had every iteration of the iPad Pro since launch. With the new interface and dock it has made it more feasible to do true work and keep a good workflow going. I use it more and more in my daily workflow and am seriously considering making it my only portable computing device.
HOWEVER, I still don't understand the idea of using it with a stand (other than the keyboard case version) or with a mouse. For me the reason I use the iPad instead of the MacBook is touch. While close (in my hand, in my lap or stood up on the keyboard) the touch and pen is very useful and is a main reason why I continue to use it. But I just can't understand the mouse idea. Maybe for certain workflows where pinpoint precision is necessary? Or do people want a tiny computer? If I need a "computer" then I would want a large screen or multiple monitors. In that workflow a keyboard and mouse are great. But for a portable touch device, it feel strange using a mouse....I mean would people also want to use a mouse for their iPhone?
Also, when you put an iPad in a stand and then use touch/pen is awkward and it entirely makes sense why Apple doesn't make an iMac touchscreen. No idea how iPad stands are popular unless it is for display purposes only. Utterly uncomfortable using touch or the pencil while in the stand.