[mewpmewp2]

This problem seems easily solvable. Just use the last part for resolution. E commerce shops use slug ids which always carry meaning in URLs for SEO and UX purposes.

So there are constantly URLs that if full url path was used they wouldn't resolve to anything.

But you juat the product id part only and then either redirect to new categories or you keep the same URL. Up to you.

I feel like all cases are teally solvable and slug ids or ids with meaning are actually great.

So I am talking about URLs like /electronics/smartphones/apple-iphone-blue-32gb etc.

This is very good for UX and usability as well.