In learning about opam read about init.
opam needs to initialize its internal state in a
~/.opamdirectory to work.
So I used Linux tree, to see what was there expecting less than a page of meta info.
groot@Galaxy:~/.opam$ tree
Needless to say those that know would not be surprised at the result but I was
…
28309 directories, 33903 files
Why so many directories and files?
Does one really need all of the extra versions of the code?