It seems to me that the point in your first paragraph argues against your points #2 and #3. If a project allows AI generated contributions, there's a risk that

It seems to me that the point in your first paragraph argues against your points #2 and #3. If a project allows AI generated contributions, there's a risk that they'll be flooded with low quality contributions that consume human time and resources to review, thus paralyzing the project - it'd be like if you tried to read and reply to every spam email you receive. So the argument goes that #2 and #3 will not materialize, blanket acceptance of AI contributions will not help projects become more competitive, it will actually slow them down. Personally I happen to believe that reality will converge somewhere in the middle, you can have a policy which says among other things "be measured in your usage of AI," you can put the emphasis on having contributors do other things like pass unit tests, and if someone gets spammy you can ban them. So I don't think AI is going to paralyze projects but I also think its role in effective software development is a bit narrower than a lot of people currently believe...