A good friend of mine owned one. His was bone stock. It was a maintenance/repair nightmare. He had some severe problems in the engine's electical system and he had to take it to the dealer many many times. I'm not sure whether they ever found what was causing the problem.
Are you talking about the FD?
Of all the problems that I have experienced in my FD, I have never had electrical problems. Look at my Sig. I've got the world's undisputed record for the most miles on the FD. Just about every non-performance-modifiable component is still stock, like the ABS, power steering, ignition, starter, A/C, but it was pulled out to make the FD lighter, master brake and clutch cyclinders, etc.
The stuff that breaks most commonly in the FD is the apex seals on the engine from our wonderfully low octane gas. Here is CA it's a whooping-tree-hugging 91.
I've mentioned in another thread that the R&R, port, and rebuild my engine cost me less than $1500. No big deal compared to a NSX engine if one were to grenade it from too much boost. It's all relative.
My 10+ FD buddies that are local never had electrical problems.
I pressure wash my engine bay EVERY week when I wash and wax my FD. I did that to my sister's Honda and the car started to misfire.
I can only imagine what the NSX might do if i wanted to make the engine compartment as bling as the FD with my 2000psi pressure washer.
Your buddy must be one of the rare unlucky ones with the electrical ailments.
When someone talks about electrical problems in a car, I start to think about European makes like Lotus, Jaguar, BMW, etc...