i'm a #golang maxi myself, no other language has coroutines in the base syntax and no other language is as readable nor compiles as fast
you can program in a functional style in go but it can make performance bad because you dump so much garbage memory when you do everything pass by value return by value and no mutability
functional doesn't really even say anything about concurrency and when you mix concurrent and functional together it's a terrible mess of memory waste and hellish STW GC pauses
on teh other hand, remembering to lock and unlock mutexes is a pain in teh ass too
it's really the thing that makes #golang shine is you can use almost every style of architecture and execution except for object oriented, it instead has interfaces and anonymous struct members which allows for concise composition of composite data types and accessors to mutate them
go is much maligned because it demands a kind of discipline that most other languages don't teach you, for example as i work through forking fiatjaf and mattn's codebases they excessively use "generics" and interfaces, which they clearly don't understand, and write code that ends up being slower and more long winded than a static typed version
i can tell that fiatjaf, at least, has a javascript/python background because he seems to loathe dealing with types properly, almost none of his interface using code has any type assertion safety, which is partly why i have to do the work to fork it, i have had code like this bomb out on edge cases many times before and i'm just not interested in delivering trash like that
in Go you can't just say "unpack this interface into this type" and pray that it is ok because it stops the whole runtime