Interesting, are there any modern 3x7 derailleur being sold that aren't plastic rubbish? definitely an option and could then try retrogrouch screw on cassette
Just get an 90's mtb with semi-decent components, and swap whatever you don't like. At least you'll see if it's your thing. Try gumtree if you feel like digging bargains, or retrobike for something nice
Interesting, are there any modern 3x7 derailleur being sold that aren't plastic rubbish? definitely an option and could then try retrogrouch screw on cassette