I built my first plane, and I'll build my last one too. ( Does anyone else besides me remember when a Falcon 56 flew just fine on a .29, and model airplanes actually flew on their wings instead of on a massive overabundance on non scale thrust?) I do like ARF trainers though, mostly because I just can't stand the thought of building a typical box trainer.
I'm really not into kits, one reason being that nowdays, a lot of them are strictly designed to be assembled with CA glue, which I don't, and won't use, because I consider it to be an extreme health risk, even worse than using dope in a closed room. Another reason is that most of what grabs my attention as far as model airplanes isn't and most likely never will be, kitted or ARF'd by anyone. another reason is that the look on peoples faces when they ask "what kit is that"? and you tell them it ain't a kit, I scratchbuilt it, is just priceless, and getting more priceless every day.
This " I don't have time to build" stuff to me is nonsense. I found time to build when I was working 13 hr days and raising kids, and my day had 24 hrs in it just like anyone elses. If you don't like to build , that's fine too, but that's the difference between a flyer and a modeler.

At least half the fun of this hobby is building. In my case probably 75 percent of it. When they quit selling balsa and plywood and music wire, it'll be time to move on to another hobby.