I use Go heavily cross-platform developing DataStation [0] and dsq [1]. I am not an expert. And I don't have proof for it but on some rudimentary benchmarks the Linux-specific file idioms in the Go standard library definitely don't seem to translate well to even macOS let alone Windows. For example some good streaming techniques for reading large files on Linux that work really well there seemed to be pretty bad on macOS.
I think Amos has presented more proof than I can on the topic of just how Linux-influenced Go is. And I think it is fine for the majority of Go users because the majority users of Go are building server apps or Linux CLIs.
Amos has spent some time building cross-platform desktop systems with Go for itch.io and I think I'm seeing some of the same things they are in that scenario.
I think this is a reasonable article. I didn't notice anything too flame-y myself but if for you Amos gets flame-y at any point I think that's worth ignoring because there does seem to be something up with Go in cross-platform applications. Amos does have good experience here. (Go look at itchi.io's github like wharf [2] or butler [3] where they are/were the main contributor.)
I like Go a lot and for most things I'd keep using it still. Just sharing some observations.
[0] https://github.com/multiprocessio/datastation
[1] https://github.com/multiprocessio/dsq
[2] https://github.com/itchio/wharf
[3] https://github.com/itchio/butler