I guess this is an annoying issue in a very minor way... But remember the days before ebay? Ebay has made it astronomically easier to find that Suntour derailleur from 1981 that you really need to finish your bike. Frankly I really don't care about this stuff as long as the core mechanic keeps working.
__________________
1964 JRJ (Bob Jackson), 1973 Wes Mason, 1974 Raleigh Gran Sport, 1986 Schwinn High Sierra, 2000ish Colian (Colin Laing), 2011 Dick Chafe, 2013 Velo Orange Pass Hunter