Tradition of Non-Cookie-Cutter Kilt Jackets?

[KFCarter]

I've been following several discussions, in several threads, about non-standard or non-cookie-cutter kilt jacket styles that have been and still are acceptable. I'm starting to get the feeling that it is somehow a Highland tradition to prefer or admire a kilt jacket that is somewhat unique, or that uses features of older styles (not exact copies, though). The discussion of the collarless kilt jackets comes to mind.

Am I misunderstanding this?

Where are the boundaries of using features of older or different styles in an acceptable kilt jacket?

Thanks for posting this question; I've been wondering about this as well and am very interested to hear the responses.