Not sure what your source for ”doesn’t support 3rd party software” is, so it’s unclear what that actually means, but there are numerous examples on Andreas’ YouTube channel about porting software to Serenity, e.g. Diablo [1].
Maybe the text you read refers to the OS itself and all first party software being written without external dependencies?
Maybe the text you read refers to the OS itself and all first party software being written without external dependencies?
[1] https://m.youtube.com/watch?v=ZOzZ8R4gphE