As somebody squarely in your target audience (sr software engineer with major respect for databases done correctly and no respect for anything like mongo) let me give my perspective.
A) I have no idea what makes rethink db better than mysql off the top of my head (maybe stuff exists, but I don't know what it is. I also am risk-averse and don't really have any major complaints with mysql).
B) I understand there are a lot of database technologies out there (mysql is always improving, people speak highly of postgres, people keep mentioning this maria DB thing, etc) which leads to a decision fatigue. It's much in the same way that if I have to choose between learning 3 frameworks, I'll just use none and see which one dies first because I'm optimizing for not learning dying technologies.
So unfortunately it comes down to marketing, which is a disappoint to anybody who wants to believe the best products will market themselves and win out. Sorry betamax.
A) I have no idea what makes rethink db better than mysql off the top of my head (maybe stuff exists, but I don't know what it is. I also am risk-averse and don't really have any major complaints with mysql).
B) I understand there are a lot of database technologies out there (mysql is always improving, people speak highly of postgres, people keep mentioning this maria DB thing, etc) which leads to a decision fatigue. It's much in the same way that if I have to choose between learning 3 frameworks, I'll just use none and see which one dies first because I'm optimizing for not learning dying technologies.
So unfortunately it comes down to marketing, which is a disappoint to anybody who wants to believe the best products will market themselves and win out. Sorry betamax.