The success of Linux over BSD has more to do with a lawsuit in the early 90's over whether or BSD infringed on Unix's source code, which made Linux the only viable open source Unix-like operating systems if you had to ask a legal department the question.

Look beyond the OS, and much of the tech stack is dominated by non-copyleft open source projects. Both the major web servers--Apache and nginx--are permissively licensed, for example. Your SSL stacks are largely permissively licensed; indeed, most protocol servers seem to me to largely be permissively licensed rather than copyleft.

And I should also point out a clear example where copyleft has hobbled an ecosystem: Clang and LLVM have ignited a major compiler-based ecosystem of ancillary tools for development such as language servers. The gcc response to this is... to basically do nothing, because tight integration of the compiler into other components might allow workarounds that release the precious goodness of gcc to proprietary software, and Stallman has resisted letting emacs join in this revolution because he doesn't want a dependency on non-copyleft software. An extra cruel irony is that Clang appears to be an existential threat to the proprietary EDG compiler toolchain, which would mean it took a permissive license to do what the goal of the copyleft license was in the first place: kill proprietary software.

I think it's pretty reductive to boil down linux' success to the choice of license. There's governance model, development model, institutional inerta, ... - and the linux ecosystem contains tons of permissively licensed pieces of software, some of which massively contributed to its success (the once-default webserver that came with its own permissive license, the APL). Even the kernel includes APL, BSD-2 Clause and MPL'ed code.

To the contrary, GNU Hurd is GPL'ed and is much less successful than the linux kernel.

That is an extremely cherry-picked example. There are plenty of examples of permissively-licensed software that is very successful, and no evidence that the license choice is why Linux won.

Good take. Also note the very well thought out decision from Linus and team to keep GPLv2, it is a balancing game.

In the end, if you want projects to succeed they need contributors. Unfortunately, some of them need to be reminded to play fair more than others, and in those cases the legalese helps.

I'm not even going to point out the hundreds of counter examples to your argument.

You clearly didn't understand my point: I'm not arguing about whether GPL is better than MIT or BSD or even SSPL/etc.

My point is that if someone else chooses to release their software with less restrictions on it than I would choose, that's literally none of my business.

They wrote the fucking thing, they get to choose how it's fucking licensed.

Plenty of organisations (and thus people) skip using GPL licensed software due to inability or unwillingness to be bound by it's terms.

I'm still waiting for the day the GPL camp says they're not going to use things like OpenSSH, Apache, Nginx, Postgres, Python, Ruby - because they're too fucking permissive.