No issues, all devices working perfectly. Apple updates causing obsolescence hypothesis completely debunked.
Why not, when things go wrong with individual upgrades, fingers of causality are immediately pointed at Apple conspiracy.That’s great for you, but not everyone has such a flawless expierience. Maybe your standards are lower than others.
Many others report their battery life or performance degrade when they update their older devices so no... it’s not “completely debunked”