I don't think there's any mainstream language where the basics of the language change every two weeks or people have to rewrite things every three weeks. I rea

I don't think there's any mainstream language where the basics of the language change every two weeks or people have to rewrite things every three weeks. I realize you're exaggerating and that you don't literally means 2 or 3 weeks, but I have Python programs I haven't touched in about 10 years that I still regularly use and that still work fine. Some of my oldest Go programs from over 7 years ago still work fine, and I'm pretty sure that if I were to try running some of my older Ruby or PHP programs (some of which is >10 years old) today it would still work either out of the box or with a few small changes (IIRC some of the defaults in PHP changed wrt. errors, so that might need a little bit of fiddling). Even JavaScript – the poster child of "rewrite every 2 weeks" – is pretty compatible. You don't need to switch to $new_js_framework and many people use older stuff just fine. The language itself is pretty compatible (almost to a fault, arguably).