The OSI's open source definition agrees with the FSF's free software definition and Debian's DFSG. The SSPL is none of those. "OSI approved" is a useful line in

The OSI's open source definition agrees with the FSF's free software definition and Debian's DFSG. The SSPL is none of those. "OSI approved" is a useful line in the sand that, in practice, tells you whether a license is free software or not, and avoids endless bickering. Which is in fact a far more adult approach than trying to do everything from first principles every time.