It's easier to exercise fun, creativity, and new ideas on such a platform because there aren't any sharp edges and you can start pushing a technology.

It's easier to exercise fun, creativity, and new ideas on such a platform because there aren't any sharp edges and you can start pushing a technology. Yeah. I don't interpret "use boring tech" as "literally don't use anything newer than 10 years old" or whatever. You absolutely can/should/must use more exciting things if they are relevant to whatever unique problem you're trying to solve. But everything else possible in your stack (particularly foundational elements) should be as boring as possible - i.e. unless you are specifically innovating in the area of RDBMS systems, you should be choosing a "boring" existing RDBMS.