Ocaml / functional programming abuses

Nothing new on this, experienced programmers know the performance implications of data structures (ie, lists are generally bad regardless of the language/paradigm) and most complains about language itself can be read as "I'm not used to this way of writing code". Which is fine, but it is an opinion not exactly a fact or a piece of knowledge.

OCaml itself is not a new language and they are probably not going to break compatibility to fix minor syntactic issues now - even the new ppx system was introduced in a way to not interfere with the current syntax. TBH I find it a very minor annoyance compared to all other more things the language has to offer.