If I were to guess, I would say he is saying that if you do HP or Complex, you won't WANT to go back to a 172. There is some validity to that, but the price differential makes a 172 pretty attractive to me.
That's kinda how it was for me. After joining the club, I started flying the 182 for longer trips, and when my preferred Archer was down for several months for engine work (first a bad cam and then a prop strike) I got to know the 182 well enough that I got used to 130+ knots, good climb performance, etc.
Now, my order of preference is DA40, C182, Archer. Because we have such excellent availability in the club, I always get my preference (since we got the DA40, I've only flown the 182 three times, and that was because I either needed to haul more weight than the DA40 could handle, or I was going into rough grass strips).
Sure, the DA40 and the 182 cost more per hour, but when all is said and done I use airplanes to go places, and the cost per mile is pretty much identical, if not even favoring the faster birds a little. Having the extra room in the cockpit, Garmin G1000 or 430W and a nice 2-axis autopilot is icing on the cake.
So, I know exactly how Artiom feels. It's hard to go back to a PA28 or 172 when you've made the transition to something bigger and/or faster.