I think the exact opposite about about FE's and custom cabs. This isn't a rant about your personal preference BTW Sandy, I still say go for it and develop your cabs remote control system to suit your needs. However, a few general thoughts in support of customization, multi-purpose cabs and FE's. I think a lot of what people are trying to achieve with their custom built emulator based based cabs these days is more about practicality and enhancement, than strict arcade experience authenticity. I totally understand the pleasure restoration folk get from restoring a mint fresh version of a cab they loved to play on back in the day. Given the time and parts availability, its something I'd like to do myself. One cabinet, one game, and attention to authenticity bordering on the pathologically obsessive, you know, make a KLOV member weep blood with envy

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However (this a series of howevers) When I make a custom cab I'm not aiming for that, I'm aiming for a new experience, something that builds on arcade nostalgia but also extends on it. There are poor example of builds where they are a 40 seater bus claiming to be a mustang, but this isn't true of all multi-game custom builds. I went to a kind of an arcade exhibition last year featuring a bunch of original 'preserved' cabs unfortunately poorly maintained. It really sucked trying to play Xevious with dud controls that wouldn't respond, I thought "I can play this much better on my Mame machine with quality controls". My point is, when I’m playing, so long as the controls respond accurately and the game experience itself is accurate, well I’m not focusing on much else at the time if you know what I mean.
Sure there weren't Front Ends back in the day, but so what, there weren't a lot of other cool technologies that can extend the experience (including you’re handy iPhone/Android apps) either. A well designed FE can be fun and useful, especially for younger people oblivious to the era. I have a pinball game with completely re-done customized (professionally recorded) music to replace the terribly dated
80’s 90's music in its vanilla version, it’s great to play it all over again with the new experience, that’s the crux of what I’m getting at.
I lived the golden era of arcades (I was 16 when Space Invaders was released to the world) you want to talk nostalgia and Arcade purism? They were tough times for me as a kid, bah, I prefer today. To quote KISS:
“The hard times are dead and gone
But the hard times have made me strong
And the hard times have made me see
That the hard times ain't where I wanna be”.