Agreed. At some point, if your language(s) of choice are decently powerful and you are decently good at them, you don't feel yourself shackled by a lack of agil

Agreed. At some point, if your language(s) of choice are decently powerful and you are decently good at them, you don't feel yourself shackled by a lack of agility, expressivity, or capacity for producing something of quality. Rather, you feel fluent. I mean, I feel a little uncool having never more than dabbled in functional-first languages. But I'm also an adult who has shipped multiple products without any undue tooth-pulling and rather enjoyed the process. So it's hard to take my feeling of uncoolness all that seriously. And then the motivation to pick up not only a new language but a whole new paradigm just doesn't seem that urgent or appealing, especially when compared to that new bit of infrastructure which will oh-so-obviously add a significant new tool to your toolbelt.