I've been doing this quite a long time. Cars have changed radically in 45 years and what were considered "must have" specialty tools at that time have slowly been phased out in favor of modern technology.
I have a drawer full of specialty tools that were very expensive when first purchased, but for the life of me, I can't remember what car some of these tools were used for. Anyone of you old-timers have the same problem?
My problem is mostly with OEM valve adjustment and head bolt tools (they were special factory orders off the tool truck) -- I must have over two dozen. Mostly Mercedes, Fiat/Lancia, Audi/VW, Simca/Peugeot, Maserati, and Jaguar.
Here are a few examples; mostly Mercedes Benz specific -- I think, but some I'm just not sure anymore
BTW -- am I the only one that has this mental lapse? or are there others who have forgotten what tools go with a particular make/model and year