Chars from different release period have different bottle neck, and ppl will hit those bottlenecks when they tried gearing up many of those char in a short period for whatever reasons.
Meta comes and go, so do characters, some of them are not effective anymore/required somewhere so no pressure to gearing them quick, thats why you probably wont hit the bottleneck like the others did.
For example, you probably have too many mk5 furnance salvages, but at the old days when rancor raid just introduced, everyone are crying for those.