I have no experience with Filson's soy wax material, but I wouldn't consider their tin cloth to necessarily be the gold standard. Though I love it still, my Tin Cruiser has been patched & rewaxed so many times it's approaching Theseus Paradox territory. I've only had it four years, so I find these claims of decades of use to be baffling. Perhaps it's the imported cotton fabric that's to blame?
Tin cloth isn't what it used to be. The Tin Cloth hunting pants used to be able to stand up on their own.
Anymore not so much. Good news is that there is nothing like well worn and duct taped Filson Tin to tell the Orvis crowd no need to apply for membership. Any Barbour item would be shredded in a lot less time with the same use.