I remember a pretty unpopular laser we (tried) to sell. After it had been out for a while and sales went to zero we just kept 1 in stock and mothballed manufacturing. Manufacturing and service became the engineer who designed it, which he hardly ever had to actually do. If there was a real problem, we'd probably just give them the better model. No one bought it, but it literally took years for the company to remove it from our "catalog".I was really surprised to see you can still buy it
I bet even if they do sell them that they don't actually make new ones. How would they get those knobs and such 45 years later?