This piece I agree with totally

A good game on a 60’s machine might last for about 5 -7 minutes. On the ‘Indiana Jones’ machine, a good game took me about half an hour. This was fun for novelty value, but after a while this happened. I’d look at the machine and think “will I have a game now?” And often the answer came back ...”No, I’ve only got about 15 minutes.” So in the end I would not play the game ONLY because I knew that to have a good game, I’d need to devote my concentration and energies for maybe over 30 minutes.... and in the busy world we all live in, I often couldn’t justify the time, or didn’t have the time to spend. ... I still prefer to play a game that takes less than 10 minutes, and do not want to spend lengthy periods of time banging a pinball around.

When I finish work, I just want to relax. With an older game, I can have a quick bash of the ball and walk away. With the games that have a ‘deep ruleset’ you have to play through all the modes, and I am left with a ‘Why bother?’

One point you missed is ‘innovation’
Games from the 50’s, 60’s, 70’s and 80’s, there was always something new, always a reason to try the ‘latest game’
Once DMD’s came in, this stopped.
Place a game from the 90’s next to the latest Stern, not a lot of difference
I suppose too much money involved, must stick with what works