Lacking any kind of incentive to upgrade constantly
The yearly cycle died for me when they started asking for £500 for a phone. Switched to 24 month contracts (cheaper monthly cost). Now I've got a 3 year old HTC and SIM only deal at the cheapest I've ever paid (£20/mo).
Even with an old handset (HTC One M9), I still dont have a SINGLE compelling reason to upgrade. And for £1000 for top of the line devices? Out-bloody-rageous. Not a chance in a million years. And thats not even built for longevity, what with the battery being inaccessible. That limits it's lifetime to a max of 3-4 years (same as my HTC, but I'll see how far the battery goes).
I can get cheaper laptops than that, which are arguably much more productive devices for any meaningful work or play.
Only chance I would upgrade now is if Sammy decide to release the W2018 in the UK (flip-phone, only available in Korea). Dont even like the slab form-factor any more, and especially hate the side-mounted power/volume buttons. Ridiculous design.