I don't know a better tool for prototyping but I found it too slow even with ~1000 clients and that is on a beefy server. If, by some magic, they switch to a more modular design (maybe they already did, not following closely) and that in some way enables the use of postgres (as a 1st class citizen), I'd give it another go for something more than a prototype.
Here is my humble opinion: If you aren't writing business logic, and will do mostly network programming, try Go. If you are doing something enterprise-y, use Kotlin or (IMHO even better) .NET Core. If you want to like writing code, try Elixir with (on?) Phoenix (or Django/Rails depending on your love affair with Python/Ruby).
Here is my humble opinion: If you aren't writing business logic, and will do mostly network programming, try Go. If you are doing something enterprise-y, use Kotlin or (IMHO even better) .NET Core. If you want to like writing code, try Elixir with (on?) Phoenix (or Django/Rails depending on your love affair with Python/Ruby).