There's one (Canadian) mass producer, Garden Pride, that consistently puts out virused hostas and garden centres buy them. I have taken 6 plants up to the garden centre staff so far this year and explained the issue. Goodness knows if they just put them back on the shelf after I left
I haven't been able to find a contact for the production company to complain--they were the ones I got an infected Atlantis from 2 years ago--they don't have contact info on their website, and they don't reply to social media comments. I've been watching everything else like a hawk since.
3 other nurseries I've visited in my area have never heard of the virus, so obviously aren't testing.
Over the weekend I drove out to a private property who is selling splits of their extensive collection, and there were SO MANY sick plants.
So yeah, it's a problem and people just don't know about it (or care).
I flip over leaves if I'm interested in a plant. It's the easier way I've been able to see the tissue collapse.