Take care and remember that most SBC alternatives (incl. NUCs) use the same memory tech that is the reason for Pi’s well-known SD card problems. But USB sticks aren’t any better. And eMMC isn’t either.
Yes there’s variances, and you can be lucky to get hold of a good product, but that’s pure luck, and the average MTBF will still be far from anything accepted in the professional world.
The bottom line simply is that all these technologies and products perform poorly in terms of reliability in this write-a-lot-scenario we will have. Check out this thread.
Whenever there’s an alternative that’s more reliable it’s just because it’s using a more reliable storage medium such as a HDD or SSD. Now you could choose to also equip your Pi with one of those.
But even such a NUC or pimped Pi still can and will fail at times (less often than SD card based one, but it will).
So either way, you have to go for a backup solution such as the Amanda part of openHABian.
And once you have that one working, you can also stick with your Pi.
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