I can already see this from a mobo vender.. oh hey.. urgent update your bios to mitigate intel's latest cpu vulnerabilities.. oh btw your will lose all your raid configs.
If you are afraid of that, don't use the built-in RAID options of your motherboard. Either get a dedicated 3rd party RAID card or go the software RAID route.
In case you go for dedicated hardware, buy two of the (exact) same cards. That will save you a lot of money when you want to retrieve data from your RAID setup when (not if) it fails. Data retrieval from RAID drives is difficult, time-consuming and therefore really expensive. You think that extra card is expensive? You easily pay 2 or 3 times that price before the data retrieval company even wants to look at the RAID mess you got. Advantage from dedicated RAID hardware is speed. You think you have good speed with the built-in RAID hardware? Dedicated hardware trumps it. Easily.
Software RAID is also quite fast, only slightly less than the built-in RAID hardware. It is more stable, usually relatively easy to repair/reconstruct and won't be affected by a BIOS update. I am running one for over 14 years already (on a Linux machine) and has not failed on me. At one time the original motherboard got fried after the unstable grid fried both the UPS and the motherboard. Maybe I should have said baked the UPS, as there was a small, but nonetheless open fire involved.
It was running on a Intel-based mobo and there was only a spare AMD-based mobo available. Swapped out the motherboards and started the machine back up. It showed warning messages about the different hardware that was detected, then the Linux software downloaded whatever drivers it needed automatically and one reboot later the whole server, including the software RAID, was spinning like nothing had happened. That was the experience I had with Ubuntu Server LTS.
Before I changed to that distro, the company decided that it should run on CentOS as that was the distro other developers were using to develop on. The hours of rebuilding the RAID that were lost after grid "hiccups" with that distro...amazing in a very bad way.
Of course, my experiences are anecdotal, but in this place no more CentOS. Ever.
On a side note: Had to do the same trick on the mail server I run on-premise, only now from AMD to Intel, worked again with Ubuntu Server LTS. Oh, there is something to mention, none of my Linux servers have a GUI installed. I assumed that helped a lot when swapping motherboards/processors.
Anyway, the software RAID does improve the speed and reliability of the data you store on it. And in my experience way more stable than any hardware based RAID solution.
Although, nowadays I wouldn't even consider RAID. The file systems: BRTFS, ZFS and the like, have practically all good qualities of RAID already built into them. Makes RAID redundant (pun intended). Just get fast drives.
Linux and BSD operating systems have the option to install these new file systems, if those aren't already included in the OS. While Windows is still stuck with the NTFS file system. Sure, you have a choice between NTFS and FAT32. Two aging systems. Yes, I am aware the NTFS has gotten a lot of new features over the years, and it is reliable within reason, but having the possibility to add different file systems would have been very welcome by now. When Windows Vista was being developed ("LongHorn", anyone?), Microsoft happily announced they were busy developing a new file system that would do most of what BTRFS/ZFS can do. Yet MS couldn't kill that attempt of progress quickly enough. Instead, only a small subset of those features have found their way into NTFS. Better the devil you know, I'll guess.