While this thinking isn't wrong, it is optimizing for the wrong thing. By focusing on future development velocity you are trading off current velocity, which is

While this thinking isn't wrong, it is optimizing for the wrong thing. By focusing on future development velocity you are trading off current velocity, which is extremely important to build an MVP, test (and eliminate) potential product paths and generally get from 0 to 1 as fast as possible. There will be a point in the product lifetime when you will outgrow the framework and you will need to rewrite large portions of it and pay off the tech debt. Most projects don't get to that point. Once there, it is also the right time to make those decisions that were classified as premature optimization. Now they are merely tech decisions with one crucial difference: at this point you have much more information about the product, the market, the customers, and your team than you had initially, so now you can take the best decisions about what will really increase your velocity. If speed to market is not essential (such as a side project for fun) then by all means, it's you now, and it's you later, so take the time to enjoy your craft and become proficient at combining the best tools to make your project shine, instead of opting for the cookie cutter frameworks.