Even before current RAM price craziness ECC UDIMM's were hard to find, and often more expensive than non-ECC. I was lucky to grab 128GB for similar price to non-ECC a few years back.
More people would use them, if they were available. RDIMM's do not work on normal consumer boards, so obviously people won't be using them.
More people would use them, if they were available. RDIMM's do not work on normal consumer boards, so obviously people won't be using them.