The last time I had to use HW raid it was horrible. The software for managing the RAID array was a poorly documented, difficult to use proprietary blob. I used it for years and the experience never improved. And this is a thing where if you make a mistake you can destroy the very data that you've gone to such lengths to protect. Having switched to ZFS several years ago, I lack to the words to express how much I don't miss having to deal with that.