Because I ruined my knees with decades of cross country running before I discovered bicycles I did my early audax years on my tourers with triples to minimise knee strain but when I thought I was good enough for an proper "audax" bike I was tempted by and drank from the "compact doubles have the range of triples" cup.
Only partly true, I give up a lower gear or two but what I really hated was that the gear ratios I used constantly were split across the rings (10 speed 46/30 with 11-36 cassette). So after a not too happy year or so I converted by audax bike to a 9 speed triple just like the tourers and most recently discovered I could make it a 10 speed triple by combining some old bits from the double days (10 speed RH ultegra shifter, XT cassette & chain) with the existing (24-36-48 Sugino cranks, XT RD, Sora triple FD, LH x3 Sora shifter).
Works perfectly, the shifters look enough alike to not be offensive at least from where I am sitting, everything shifts well, even better and I can stay most of most rides in the middle ring running up and down the cassette (11-36,) and having 3 good lower ratios on the small ring and 3 higher on the big ring, very happy and very cool.