This is Lenny. Most users probably do. Good percentage still have a few. A few of us make new ones now and then.

(Technically not dumb ones, though. And completely excluding terminal emulators, which are of course ubiquitous.)

Dumb terminals were extremely prevelant throughout the 80s and into the early-mid 90s. Most people just didn’t know that they were “dumb terminals” and either just thought they were early desktop computers or just heard them referred to as a “terminal”. That same library didn’t update their dumb terminals to actual computers until the mid 90s, but they did however remove the light pen in favor of a keyboard at some point well before then.