GHC's `-j[<n>]` flag, useful enough to be a 'default'?

[atravers]

Another potential issue is the use of the multithreaded RTS - it still has some “rough edges”:

Make GHC -threaded the default RTS

When making a service, program, or even a complex CLI, one almost always wants the threaded RTS. It seems well past time to make the threaded RTS the default RTS. The arguments are numerous but generally boil down to correctness and expected operation. What blockers, if any, do people see in changing the default RTS?