For longevity I'd put my money on Clojure over Flutter or Kafka (which are younger techs too). And of course Datomic now is effectively in-house software for Nu

For longevity I'd put my money on Clojure over Flutter or Kafka (which are younger techs too). And of course Datomic now is effectively in-house software for Nubank and has been conceptually validated besides on its own merits, by the number of kindred DBs around[1]. IME Clojure is boring in a good way vs Java, as the pace of language evolution is slower, the language is simpler, and simplicity is more highly appreciated in the culture of the ecosystem. [1] See first 5 in https://github.com/razum2um/awesome-clojure#database https://github.com/razum2um/awesome-clojure#database