Well stated.
Some time ago I opened a discussion somewhere on Xweb (perhaps earlier in this thread) about what defines "stock" vs "modified" vs "fully customized". Obviously in reality there is a full continuum all along that spectrum, with no real definition points set anywhere. Over the decades and countless builds I think I've pretty much touched every aspect of that continuum. And I agree, some vehicles tend to lend themselves more to one end of the spectrum or the other. However I also think every vehicle can be made to fit anywhere along it if done correctly. For example in the case of the X1/9 I feel it can be well styled as either a very mild modified-stock design, or a fully customized-racer design. And both look great.
As for a totally stock, originally styled, completely untouched design as it came off the assembly line, I have to say there hasn't been a vehicle ever made that couldn't benefit from some alterations. But that's not to say the original designer got it wrong; it is the changes that take place
after his initial design - to fulfill safety, regulation, production, and cost requirements - that ruined the design as it was first intended. So at the very least the production model needs to be modified to remove those compromises and more closely match the intended styling of the designer. In that respect, in my opinion, every car will benefit from at least some customization. Personally I like to take it at least one step further and add my own "personalization" touches as well....having a stock car like everyone else is boring. But as
@visualistics said, everyone has their individual preferences and should do as they wish to their own vehicle.
By the way, I was wondering when someone would get around to using the word "ethos" in this thread.