I ask this because I think of the recent switch of Ubuntu to the Rust recode of the GNU core utils, which use an MIT license. There are many Rust recodes of GPL software that re-license it as a pushover MIT or Apache licenses. I worry these relicensing efforts this will significantly harm the FOSS ecosystem. Is this reason to start worrying or is it not that bad?
IMO, if the FOSS world makes something public, with extensive liberties, then the only thing that should be asked in return is that people preserve these liberties, like the GPL successfully enforces. These pushover licenses preserve nothing.
Compare Ubuntu and MacOS. MacOS ships ancient version of Bash because its GPL2 which allows for coexistence with proprietary software on sold machines.
So if Ubuntu gets rid of GNU coreutils and sudo what else stays GPL3 on a barebones system? You can swap Bash with Zsh like Apple did. And just like that you got yourself a corpo friendly distro to ship proprietary software. Just like Android, and look where that got us.
sudo is not GPL3. It is not even GPL2. It is an old license that is just as permissive as the MIT license. It has never had any big problems with that being the case. I don’t think that coreutils being GPL has really done anything to force companies to contribute back to it. It is mostly fixed in its function and does not really have much room for companies taking and modifying it to a point where others will favor the closed version over the open on. And what it provides is fairly trivial functions overall that if someone did want to take part of it then it is not terribly hard to rewrite it from scratch.
GNU Coreutils is not the only implementation of those POSIX features - just the most popular one. FreeBSD has its own, there is busybox, the rust ports and loads of other rewrites of the same functionality to various degrees. None of that really matters though as they dont really add much if any value to what coreutils provides as there is just not that much more value to add to these utilities now.
And it is not like the GPL license of coreutils affects other binaries on the system. So if you dont need to modify it and it does not infect other things there is little point in trying to take it over or use an alternative.
MacOS does not use a later version because they cannot. But also they don’t care enough to even try to maintain their own.
GPL is important on other larger/more complex bits of software. But on coreutils/sudo IMO it does not matter nearly as much as people think it does.