I used to. Pebble, Pebble Steel, Huawei Watch, Samsung and a Galaxy Watch were my main ones. About a year ago I stopped. I was getting fed up with the battery life and the limitations. It's bad enough having to charge my phone every day but a watch as well? Sheesh.
When I used to be up in London more it was good to look at my wrist to check notifications or navigate as it felt safer than walking around holding a phone.
Now I cycle through my collection of G-Shocks (which has grown during lockdown!), with a Huawei Band 4 Pro on my other wrist to track steps and, via the GPS, runs and bike rides. Can't say I'm missing any of it. I think Qualcomm are mostly to blame for my disillusionment with smartwatches, they've really been massively off the pace when it comes to power and power management. If I had something I could use for a couple of days solid that would run GPS and navigation for a couple of hours a day and BT my music directly to my headphones, I might still be using a smartwatch.