That's too bad, sorry to see them go. In need to order some sanding sleeves I guess, that is the one thing I still buy from them (for a Woodtek sander).
I can't say as I'm surprised however. I used to buy mortiser bits from them, either Star-M or Nakahashi. When they ceased carrying them I was lucky to find I could special order them (the auger only not the set) through Lee Valley as well. This was a couple years after they ceased carrying Woodtek at all - Many of the Woodtek machines looked like ones Grizzly also carried, so I always suspected they were from the same factory with different paint. I kind of wondered at them discontinuing that line of products, it wasn't as sexy as Delta or whatever, but the lower price point brought customers into the store, and it was serviceable stuff.
The two machines I have are their heavy mortiser and a drum/flap sander. Both excellent machines for imports.
I don't think it was the pandemic. ABQ Exotic Woods seems to have made it through that just fine and they were a much less well established business. Better management is my guess.