They would rather sell them in bulk...to bulk buyers...for scale reasons. They average around 10% of the market. They were nukber three days n volume and two in revenue for a long time. Still float around that point
It's rather like proving a negative. If they were really popular, chances are I'd have seen one by now - but I haven't. That doesn't mean they aren't popular, but it reduces the odds.
Otherwise, Intel SSDs have quite a bit of share in the datacenter space. If you haven't seen them before, that's likely because you're not an enterprise customer.