I was a 1000+ hour military RW guy with commercial instrument, and got my airplane commercial crossover and about 10 hours of instrument (including 6 hours complex) before I stopped (really just had my cross-country in prep for the check ride). Sadly, life got in the way.
But I'm a gamer, and my navigation and commo are very good even today, my biggest issue is the new avionics, the old stuff is still familiar. I think I'd pick up the flying fast enough, but I'm targeting 40 hours to get back fully, because that's when I feel like the aircraft and I really came together.