I suspect we have parallel logic (gen X by any chance?) ..except in this:
My first exposure to homebrew was in the late 80's early 90's and I often tasted the plastic in the beer, but since the 'great exposee" on poorly formulated PET water bottles in the later 90's I have noticed and begrudgingly went out of my way to experience beers made in modern PET fermenters....I'm specifying PET such as Fermonsters, Fermzillas, Vinage Shop carboys and so on, as I still occasionally taste HDPE, and yes, I expect flames for saying that but honestly without bragging; I have a very sensitive and analytical palate.
If you feel like trying out a stepping stone; buy a Fermonster or Fermzilla and give it a try; If you can taste the plastic: Get back to me and I will refund you $40 via paypal or Interac e-transfer (if you have that in the US)....and if you haven't guessed from my blatant posts; I live on a very restricted budget, but such is my faith in these things...they are indistinguishable from glass-carboy fermented beer.
I do though, also strongly support getting a larger one even if it is only used occasionally. For myself, I have a couple of sankes with my own Fermhead for closed transfers and if needed; pressure fermenting and I have a gen 1 14.something Gallon Fermzilla I bought because I felt drawn to a pressure capable conical with a dump valve but can't afford SS and now I'm still kicking myself for not getting an All-rounder...the physical use of the fiddly dump-valve is more work than reward for my disabled body....in fact, if you decide to spend a long time in choosing: If for any reason you feel like visiting Canada, I'm about 5 minutes from either the bridge or tunnel from Detroit: Bring me a used corny keg or sanke for trade and you can have thing.
I'm only unhappy with the dump valve, the taste is perfect and uncontaminated.