[avadodin]

The decent cross-compatibility in the early 00s was a result of the multipolarity of the era.

In the late 90s-early 00s we had SystemV, Linux, BSD, macOS and the market begged for standards like POSIX and to an extent CDE and many other proposed ones. As the largest player, Linux always had an attitude.

Now, after winning the Server, embracing, extending and extinguishing the Workstation/Desktop(WSL, Valve), and with a foothold in mobile(Android) Linux is the de-facto standard.

The BSDs have declared POSIX dead and gone their own way while supporting Linux(SystemD, Wayland) APIs even if they are more half-baked than POSIX in order to benefit from what is now virtually a Linux ecosystem.

I don't like this any more than you but it is what it is.