> "Unless you’re offering MongoDB as a service, it’s just as “open source” as ever."
It's not. It's source available, and that's still proprietary.
The reason why the SSPL is not Open Source is pretty simple: it doesn't convey the four essential freedoms of free software [1]. That's it, there is essentially no more to it: it imposes usage restrictions, and that's orthogonality against the spirit.
Whether it is "except this or that" or "AGPLv3 but with this additional clause" is irrelevant: even the tiniest change can cause significant differences, and this is the case: it removes the freedom to run the program as you want, as it imposes restrictions to some use cases. And these restrictions go beyond the realm of the software itself.
In contrast, Open Source copyleft software, like AGPLv3, never go beyond the software itself. It provides guarantees that modified versions of it also remain available for users of modified software (forward carrying guarantees) but do not add a requirement to also provide under the same license other unrelated software (which is essentially a nice way of saying "simply don't do this", turning de facto into a usage restriction).
It's not. It's source available, and that's still proprietary.
The reason why the SSPL is not Open Source is pretty simple: it doesn't convey the four essential freedoms of free software [1]. That's it, there is essentially no more to it: it imposes usage restrictions, and that's orthogonality against the spirit.
Whether it is "except this or that" or "AGPLv3 but with this additional clause" is irrelevant: even the tiniest change can cause significant differences, and this is the case: it removes the freedom to run the program as you want, as it imposes restrictions to some use cases. And these restrictions go beyond the realm of the software itself.
In contrast, Open Source copyleft software, like AGPLv3, never go beyond the software itself. It provides guarantees that modified versions of it also remain available for users of modified software (forward carrying guarantees) but do not add a requirement to also provide under the same license other unrelated software (which is essentially a nice way of saying "simply don't do this", turning de facto into a usage restriction).
[1]: https://www.gnu.org/philosophy/free-sw.en.html#four-freedoms