Perhaps worth mentioning briefly that for anybody who -wants- to continue using camlp4, I’m (a) maintaining camlp5 and bringing it up-to-date with everything in ocaml 4.10.0 that I can think of, and (b) I’d be happy to help them port their dependency over to camlp5.
This is not to be construed as an argument for using camlp4/5.