Everything that use in your desktop environment, every single tool, came from the GPL era of the 90s/2000s. Even as some of the default licenses people use has changed, nothing on the Linux desktop would exist without the GPL and the impossibility of Microsoft to compete with truly free software (well without eventually trying to embrace, extend and extinguish it .. which is still hasn't done .. not really).

Even the Mastodon server you run is AGPLv3.