These speakers still have a small cult following based on the strength of the brand during their reign, but it makes little sense to pay "vintage" equipment prices for them when you can buy better new speakers for a similar or lower price. Speakers don't get better with age.
Regardless of the continuing existence of these speakers in active roles I am wildly skeptical that the person I'm responding to sees them "all the time". Unless they keep going to the same old studio that hasn't been upgraded since 1989 and having the same conversation with the owner every time. That'd be weird.
My "all the time" is going from the late 1980s to 2007. Though I still see people with only NS10. There was a studio in my city 2 blocks away. NS10 were on the wall and was the primary ears for the mixing.
It's pretty rare to find NS10s in active studios today, in my experience (which is much more limited than in the past, but even when I was working professionally in the field two decades ago, the NS10 was on its way out among the thought leaders in the industry).
They were a reliable workhorse that had a good run and helped make a lot of great records, but they aren't really relevant today. I worked on them a lot in the 90s, and I don't think they sounded like a brown paper bag, but I can see how one would prefer a more modern design (I've never owned or wanted to own a pair). But, they had their positive aspects.