As an owner of 11 System 1 games - theyre not stinkers..
With the Pascal board these things will work about 95% of the time. The 5% that doesnt usually needs a connector to be re-pinned.
Ballys of the Era have Alltek
Williams System 3-7 - how gawd awful is that interconnect between the 2 boards? and Scanbe sockets?
My point is, every system has their shortcomings, are some worse than the others, sure!