- It works well enough. - It scales up fine for 99+% of companies, and for the ones that need to scale beyond that there are battle tested solutions like Vites

- It works well enough. - It scales up fine for 99+% of companies, and for the ones that need to scale beyond that there are battle tested solutions like Vitess. - It is what people know already so they don't have to learn anything new. Same reason why people still make new websites in PHP I guess. It's not fancy but it works fine and won't bring any unwelcome surprises.