My OpenWebRX+ is now up and running in a temporary setup on a Pi 400. The biggest visible change relate to OpenWebRX is a noise reduction setting and some added digital decoders. I am still exploring all of the menus. One of the things I want to do is grab SSTV images off the air - that's possible with this config but not with the old system, but no success with it yet.
The install was pretty easy - I used their pre-baked image for the Pi 4, burned an SD card, booted it, added Tailscale as I usually do, and all was well. In the process I lost all of my OpenWebRX customizations but they were easy enough to add back in by hand. In any case I wanted to revisit some original decisions so not all was lost.
The Pi 400 is perfectly adequate for OpenWebRX+ in initial tests, but I want to move this to a Pi 4 with more open USB ports so that I can add a second RTL-SDR tuner. I have a Pi 5 on order but no particular guarantee that the whole setup will work there out of the box without at least one tweak to some component.
The AirSPY HF+ covers broadcast AM and FM, shortwave, 20-80 meters ham bands, NOAA weather radio, pirate radio on 43 meters, the 2 meter band - basically a lot of listening. The RTL-SDR would add 440 MHz and the ADS-B band at 1090 MHz. It's also the case that though the RTL-SDR has less bits of listening precision it does cover more spectrum in one go, which is handy for watching more of the band at once.
When I do an A/B comparison between my setup and the KiwiSDR nearest by ("Pembleton Farms", in Northville Township) my configuration has more noise and can't pick up signals that are as weak. I'll chalk that up to my lack of acreage to run a big 230 meter Beverage antenna!