Updated my 13 mini. Performance is fine / maybe better.. but battery. Tanked. How true is the ‘it takes days for reindexing’ statement?

Re-indexing does occur after an update, but iOS 26 consumes more battery life than iOS 18 anyways.

Just in one example video ( https://www.youtube.com/watch?v=0eCUkYJ8A98 ) they see the phone get hotter and the battery drops 13x faster during non-static sequences like checking notifications, etc.

Just anecdotally, my iPhone 16 Pro seems to last half as long. Before iOS 16, I got from 80% to 20% without a problem. Now, I charge to 100% and I still need to recharge throughout the day. Apple simply fucked up our phones.