I’ve stated elsewhere how I use Mac widgets. I wish the poll hadn’t driven us to extremes; my use is moderate on all platforms except the watch. Ordering my use, it’s Watch>iPhone>Mac>iPad.
On the Watch, although I previously heavily used complications and the Dock and now use neither (yea Snoopy watch face!), I was able to use the Smart Stack (combined with writing a few simple Shortcuts) to replace the lost functionality. Apple erred in not providing a smooth transition to this setup (and a way to revert if you couldn’t or didn’t want to do it immediately). Unlike most Apple upgrades, the Watch 10 upgrade forced users to change how they used the device, with little aid in guiding a transition. It took me a week or so to get things right, so I understand the anger of folks who were happy with what they had and didn’t see a need or have the time to understand how the changes might be better.
Note that WatchOS 10.2 will provide the option to revert to the old way of changing faces so that if you use multiple faces, switching will be easy (and if you don’t want it to be easy, you can stay with the new behavior).