When Microwaves first came out they were huge but with a tiny cooking area and they were not affordable, and were mostly in business kitchens and a few restaurants. I would love a freeze dryer but the cheapest I have seen is $1600 and they only have 4 small trays.
Freeze dryers are much less useful day-to-day so the market is much smaller which won’t really drive much of a scaling up of production like happened for microwaves I imagine