The big flaw with that mentality is that arcade cabinets are by far one of the most inconvenient methods to play video games. They are giant wood monoliths designed specifically for 5 minutes intervals of gameplay in a commercial setting and endure being kicked, punched, spilt on and have cigarettes put out on it. If it was only about the games, then most people here would be playing at their desk or couch using a gamepad or fight stick.
I'm surprised somebody here would say this, because I couldn't disagree more. For me, there isn't a more immersive and awesome gaming experience to be had on the planet, than standing (yes, standing, not sitting on a stool) in front of an upright cabinet. Aside from the glory that is arcade-style buttons and sticks, it's having the screen angled right at your face a few inches away, it's having the speakers (not earbuds) hovering right above your ears (or somehow nearby), it's the rock-solid sturdiness of the "wood monolith" that allows me to put my whole body into a game like Robotron and have the thing not budge, wobble, or tip over.
Since building my first project, I've completely lost the desire to play my old consoles, because after spending so many hours playing on my cabinet and others, sitting on a couch with a d-pad feels downright lame by comparison, and I can't get into it anymore. If I want to play some retro console games (which I still do from time to time), I pick the ones that work well with arcade controls and play them on my cabinet (another taboo topic, I know, but again... everything I said above applies equally to console games, regardless of the fact that they weren't actually in arcades originally).
We respect trying to be authentic because we don't want to wash away the product. If I were a musician influenced by the band Nirvana, and wanted to write a song to tribute their style, would I throw in rap lyrics about drinking 40s?
Admittedly a good analogy, but my point is, you can still do an unambiguously Nirvana-like tune without gargling nails before you record and without using a left-handed Fender Mustang played through a Boss DS1 on a pawnshop amp with a ripped speaker cone.... and chances are, if you DID do one, you'd not be following that recipe to a tee; you'd be taking some liberties like, for example, recording into a USB 3.0 PC interface rather than a vintage analog rig, or using a right-handed Ibanez that's not held together with duct tape. So, as with building personal arcade cabinets, the "non-compliances" are ever-present... and my point is that to get up on a soap box with a bullhorn and try to make newcomers believe that certain arbitrarily-chosen non-compliances are acceptable and others aren't is stupid. Bottom line, no MAME cabinet is a real arcade cabinet, so build something that you can enjoy, that plays the games you want, and that fits into your home and recreational space the way you want.
I'm making myself seem like I care about cup-holders much more than I actually do--I didn't put any on my last project--but for me, the to-cup-holder-or-not-to-cup-holder discussion exemplifies the irritatingly dogmatic nature of this hobby. Whenever newcomers express an interest in building something and talk about their ideas, there is always a legion of good-ol-boys lined up around the block to tell them all of the the things they're doing wrong (or are about to do wrong). Now, to advise against a Pac-Matt control panel is actually good advice because there are practical drawbacks of such an ill-guided mess... but little personal touches like cup-holders are not in that category at all.