all you seem to get on forums is Rev, Rev,Rev.
They are the way, the truth and
I can't think of one quad tribe (iQuad, Flying Squid, FLIC, etc, etc) that doesn't do Revs. Outside of a few notable exceptions I only ever saw Revs (or Rev-copies or I-Can't-Believe-It's-Not-Revs
) in competition.
So in answer to your question "does anyone take any four-line kite seriously other than the Revolution?" the answer is probably no serious quadline flier does
but feel free to make your own mind up.