I think the answer as to why Optane consumer SSDs were killed off is fairly clear. They were 5 or 6 times the price per gigabyte as NAND based SSDs and didn't

I think the answer as to why Optane consumer SSDs were killed off is fairly clear. They were 5 or 6 times the price per gigabyte as NAND based SSDs and didn't offer more performance in most consumer applications. The SOHO community didn't like them all that much either because the consumer Optane SSDs lacked most of the low queue depth performance that the enterprise disks are known for. Most consumers are also replacing their SSDs long before they actually wear out, so the extreme durability of Optane is kind of moot there. It's a fantastic enterprise product, but I don't think most consumers are really getting any extra value out of them over NAND at this point. The only guy I knew who bought one wanted to put their Gentoo build directory (/var/tmp/portage) on it.