The only point here that _may_ be considered valid is #5: Crowd sourced decisions may be bad for you.
The reason one could consider this to be true is that often open source design is hype driven, and not long term benefit driven. Exceptions can be seen in communities like Rust, but there's still lots of issues there (like async). However just because there's lots of hype does _not_ mean you have to bow to it. You can easily commit to a read-only release of the code which obviates all the need to actually participate in the community.
And of course there's successful models like VSCode, which manages to be _mostly_ open, but all the "cool parts" (like Copilot) are still not possible to reproduce with the provided source alone.
Many ways to open source your code and still have people pay for it!
The reason one could consider this to be true is that often open source design is hype driven, and not long term benefit driven. Exceptions can be seen in communities like Rust, but there's still lots of issues there (like async). However just because there's lots of hype does _not_ mean you have to bow to it. You can easily commit to a read-only release of the code which obviates all the need to actually participate in the community.
And of course there's successful models like VSCode, which manages to be _mostly_ open, but all the "cool parts" (like Copilot) are still not possible to reproduce with the provided source alone.
Many ways to open source your code and still have people pay for it!