To keep the ball rolling with std lib pruning, here's my proposal (kind of a sketch, not to be taken too literally).
* * * **Level 1 - "Nim Kernel"**: System modules that every Nim compiler supports (embedded systems, virtual machines, etc). algorithm base64 complex critbits deques hashes endians fenv intsets json lists (+sharedlist) locks logging macros marshal math nativesockets parseutils pegs random rationals ropes segfaults sequtils sets stats streams strformat strscans strtabs strutils subexes tables (+sharedtables) threadpool times unittest * * * **Level 2 - "Nim Standard"**: Nim Standard library modules for currently popular mobile and desktop operating systems. asyncdispatch asyncfile asynchttpserver asyncnet dynlib encodings httpclient md5 memfiles mimetypes net os osproc parsecfg parsecsv parseopt2 posix rdstdin selectors ssl terminal unicode uri winlean * * * **Level 3 - "Nim Extra"**: Modules available as installable Nimble packages. All available out-of-the-box in a Nim Legacy Distro. asyncftpclient asyncjs basic2d basic3d browsers cgi cookies coro db_sqlite db_mysql db_postgres distros dom events fsmonitor future highlite htmlparser httpserver iup jsffi lexbase matchers mersenne mysql nre odbcsql oids options parseopt parsesql parsexml pcre postgres re rst rstast rstgen scgi sexp sha1 smtp sqlite3 strmisc xmldom xmldomparser xmlparser xmltree
