A lot of these issues are now solved. OCaml universe now switched to Dune[1] as an uniform buildsystem, using ocamlformat[2] as an uniform formatting tool (succeeding over ocp-indent), Base[3] standard library aims to be the only one, a lot of legacy cruft was removed in recent compiler versions, along with improved error messages. Real World OCaml book[4] is now being modernized for the second edition. Recently even the design of documentation produced with odoc was improved and cleaned up a lot So it tries to catch up with more modern programming languages.

[1] https://dune.build

[2] https://github.com/ocaml-ppx/ocamlformat

[3] https://opensource.janestreet.com/base/

[4] https://dev.realworldocaml.org/