After nearly six years, I have a 40 characters pretty well outfitted. Some of them are a little outdated due to some power changes and need a respec to get full utility again.
My first few mains hit 50, had generic IOs and then started getting sets installed. Mostly tankers and the like since I found blasters worked fairly well, but the more the 50s got played, the more influence, drops, etc... happened and I was able to afford more and more. I still have 50 alts that need to be outfitted efficiently, but it's more a time and research cost at this point. I find I procrastinate just enough to build up enough purple recipes and merits that I've been needing to sell off "junk" just to have enough space when the next character is ready for respec.