Although I need to spend some more time with the Pi4 build testing (observations in another similar titled post), I thought I’d give the x86_64 route a try for fun while I had a spare hour.
The installer recipe worked without hitch (installer built in a VM and Rockstor 4 installed to another VM). Selected Testing Channel and update happened to 4.0.2-0.
So far functionally seems to do what I expect it to, which is nice.
So, somewhat shorter observations that I have with my current Pi4 build, but thought I’d just give another thumbs-up for the installer build process.