I, like you, have been running the factory pair since 10/16, and I do agree that the tire is about near-perfect as a tire can get. Since then, I've probably had one or two punctures. In fact, I like the tire so much that I've taken the somewhat expensive step of future-proofing myself with a pair of spares - probably the last pair the vendor had in stock.

Which brings us on to the fact that the tire has been discontinued, with no apparent direct same-size replacement from Schwalbe in sight. It would seem that the only options for a quality replacement from the same manufacturer is to either size down to 1.50 or size up to 1.75. Continental don't even offer 406 tires altogether. Hence my question about the Tioga.