The complaint I had, was to due mainly to due with the many inadequacies of Mame to run games like TX-1 properly.
1) Mame does not have a single switch shifter option. So, no high - low gear shifter can be used correctly.
2) Mame did not at that time, output more than 2 speakers. (have not checked to confirm if that was fixed recently or not) TX-1 uses 4 speakers, and they help to convey the feeling of 3d space. When you pass cars for example, the sounds of that car pass to the rear speaker.
3) As far as I know, Mame cant connect to Optical pedals? ... such as the ones used by TX-1, as well as Sega's Turbo. This makes it so that If you had an existing game, or found a broken one cheap... where the PCBs were mission & or fried... you couldnt power it with Mame to get it functional. (until such time as you may be able to afford repairs and or find functional parts.. if they even exist)
So...
Yes, you can get the monitors to display... and the wheel to operate. But you cant use the shifter without a custom build, nor can you use the original pedals. And... you dont get the true 4 speaker output, which is totally lame.
(even Sega Turbo has 3 speakers, the larger speaker being a Sub, which plays the engine noises and tunnel amped effect)
So.. what do most people end up doing? Selling off the original parts, and Butchering an original machine... even IF they wanted to try to maintain its original purpose (with addition to being able to play a few more games on it). Such changes will be so radical, that they are not really reversible anymore. And most will choose the most drastic changes, because they figure its impossible to resurrect anyways. Where as, if the ease of conversion was possible... they may often choose that route instead, which is fully reversible. (PCBs and wire harnesses, as well as original controllers.. all left inside the original cab)