The flexibility might not just be in the tools themselves, but in the culture of the language. Elixir for example has really powerful macros, but one of the mai

The flexibility might not just be in the tools themselves, but in the culture of the language. Elixir for example has really powerful macros, but one of the main books about metaprogramming says "the first rule of macros: don't write macros". So you have some beautifully designed DSLs like Ecto.Query showing how powerful they are, but you rarely go trying to solve your problem by using that power for creating your own DSL or language (and mostly just use 'use' macros for code injection in your module). So even if one language's power is enough for someone's programming ambitions, they might still want to go for an environment with more like-minded people that are more supportive of using (and in the perspective of some, abusing) that power.