I remember that post you shared - yes, was very nice to pop the drives over to the replacement and things came up with minimal effort.
I have one of those QNAP boxes (TS-453Pro) with the
AVR54 issue - it's been solid to date, but I'm proactively replacing it as it's getting on in years in any case. I do back it up one a week to a couple of external USB HDD's, which is common sense even without the Intel issue...
Nothing against QNAP - it's a life cycle issue with the Intel CPU that has affected many vendors.
That issue basically affects every Silvermont/Airmont based device out there, not just limited to specific SKU's/models