[EGreg]

Apple has a history of gradually strengthening ITP until it breaks all the tabbos you'd never expect.

Today it strips ?utm=928931823 from abc.com/foo?utm=928931823 but tomorrow it can strip the 928931823 from abc.com/foo/928931823 leaving abc.com/foo ... after all it can just look at all the links arriving in mail, and use an algorithm to deduce the pattern abc.com/foo/:trackingId and simply mangle the URLs.

Think they'll never do it? They already deleted FIRST-PARTY cookies and much more!