As far as I understood it, bootstrap.dat gets loaded automatically while with "-reindex" people need to know how to add something to a command line. I am not sure if this is not causing more issues for more people than the ones trying to run Bitcoin-Core on some ancient hardware.

Also Bitcoin-Core could prompt the user after importing from bootstrap.dat to delete the file, to combat the "double space taken" issue. I'd at least like to see both approaches continued until Bitcoin-Core finally is capable of downloading blocks from more than one source, then this whole thing can be discontinued anyways.