Except that when you did connect Windows to anything it was hacked in less than 30 seconds (the user ignored the "apply these updates first, and then connect ..." advice, they wanted some keyboard driver. Hacked, whoops, gotta waste time doing a wipe and reinstall. This was back when many places had no firewalls). IRIX would fall over and die if you pointed a somewhat aggressive nmap at it, some buggy daemon listening by default on TCP/0, iirc. There was code in ISC DHCPD "windows is buggy, but we work around it with this here kluge..." and etc etc etc etc etc

Not just dhcpd. Besides the entire existance of Wine and Samba, Qemu has a workaround for win2k. Mkudffs has a workaround for MS-Windows not being able to read the filesystem without an mbr. Libc can work with local system time for those who dual-boot. Git can work around the difference in line endings. There are probably more of these kludges than you can shake a stick at.