My first experience with ignitions goes back to the mid 50's and I don't remember anything other than the Sun machine shown above. There were newer versions in the early 60's that I used in the hotrod shop. We even had one that could run magnetos...it was converted from a standard machine. The later ones could run up to about 8000 engine rpm.
We did use an oscilloscope in the 60's which was quite advanced for the time. A real PIA to use for everyday tune up however. It was great for finding that nasty ignition problem that defied reason however.
There were other fancy and exspensive tune up machines that really were a lot of hocus pocus things.
As noted above the dwel/tach was cheap and everyone had them.
Last summer on one of our cruises we saw a vintage Sun Machine sitting in a corner. The guy didn't know how to run it or anything about it but wouldn't part with it....it would be worth something some day was his comment.....another guy with 'hoarder disease'.