What I'd like is a tool that can be run on a fresh linux install to show what's not working correctly and maybe some diagnostics. Does that exist?
Things like suspend to RAM/disk working, GPU performance is reasonable, WiFi and disk speeds aren't slower than expected.
> Things like suspend to RAM [...] working
If you're on and AMD laptop then suspend to ram can be tested with amd-debug-tools[0].
> WiFi
Here[1] is a list of public iperf3 servers. You can test your connection speed with (change host name and port to appropriate server):
You can also launch your own server so you're not limited by your internet speed (I usually run one on my router):