From the liitle bit of lookin at heavily modded cars I've done, he may be correct. It's kinda like collectibles. The right person who want and likes what you have done to your car has to happen along at the right time. The mods are, I think, primarily to suit your pleasure. If you look at what happened to Mean Green from that other forum, I don't think he'll ever recover his mod money. However, he got the satisfaction he wanted from the car which was dialed in the way HE wanted it.
Me personally...very minor mods and really nothing that can't be reversed easily and cheaply when bailing.