It's the same thing as Eternal September, and complaining about cultural dilution by a mass of developer immigrants will do as much good.

What is productive is being a respectful evangelist for the ethos you want to inculcate in the next generation.

What's forgotten about enculturation of newcomers is that most of them have no strongly held beliefs about the new domain.

Which is an opportunity for education and pursuasion, with a little elbow grease and diplomatic effort.