I’ve been in the field for 25 years, including work inside telco COs and large data centers, and as far as I know I’ve never been in the same room as a VT220. I doubt that many of my more junior coworkers have even heard of one.
I know what they are and how you might still use one today, but they’re extremely rare outside maybe a couple of very narrow niches.
When I was in college in the mid 90's, VT220's were still common on some parts of campus. A few years later, I had a job at a mostly DEC shop. They had a few terminals here and there, connected to Alpha Servers and a couple of old VAXes.
I haven't seen one in the wild in a little over 20 years...
That’s certainly possible, but if so it wasn’t something I had personal contact with enough to register that it happened. And I definitely knew what those terminals were, so I’m pretty certain I would have noticed that “oh, hey! A real VT220!”