> The ideal usage of optane was as a ZIL in ZFS.

It was also the best boot drive money could buy. Still is, I think, though other comments in the thread ask how it compares against today's best, which I'd also love to see.

This concept was very popular back in the days when computers used to boot from HDD, but now it doesn't make much sense. I wouldn't notice If my laptop boots for 5 sec instead of 10.

At the time of their introduction Optane drives were noticeably faster to boot your machine than even the fastest available Flash SSD. So in a workstation with multiple hard drives installed anyway, buying one to boot off of made decent sense.

If they had been cheaper, I think they'd have been really, really popular.