The next iteration for Rpi X IoT should be industrial SBC grade with 10 year life in the harsh environment running clusters of Plan 9 cpu and fileservers backstored to NVMe X.
Having a running plan9 cluster since ~3years, auth (1) and cpu/auth servers (6) are all rpi's, just the file-server is a virtual x86 running in a DC (Hetzner), it's a great system, i really love it.