Hi STTNG is no more higher maintenance than any other machine in my opinion, yes it has its foibles as do all machines , the tieback wire for the divertor coils is a crappy design as
@Kenny Taylor has just found out but a diodes on each coil would have prevented them from frying.and adding an extra wire as a failsafe on the tieback is beneficial.
The only other weakness is the cannon looms years of constant movement can fracture the wires also opto problems can crop up but all games from this era suffer too.
It currently sits at number 14 in the pinside top 100 and has always sat in the top 20 or top 10 as far as I can remember. I've had mine for about 8 years and it will probably be the next one to move on still enjoy it though.