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More than happy with my Xs Max iOS 13 Jailbreak. Don't see a single feature I'm missing out on either 14 or 15. They're really testing their user's patience by not bringing any visual overhauls.

My 12 Pro Max is jailbroken on iOS 14.1, and I’m happy where I’m at. Even if I tried to update, I can only do so through iTunes. This jailbreak won’t allow me to update over the air and that was perfect. I can’t even update my S4, which is still on 6.2.8.
 
I have an iPhone 13 pro running iOS 15 and I’m not having any of those issues. I’m driving a new Subaru with only a little over 1K miles on it.

I'm glad you are getting a reliable, consistent experience (not sarcasm). Based on what I have read online and my conversations with Apple Support and the Geniuses in the Apple store, this seems to be a fairly common issue with iOS 15, more so with the iPhone 13, 13 Pro, and 13 Pro Max.

I have read about this occurring on older iPhones running iOS 15, but it seems to be less common than those running iOS 15 on an iPhone 13/Pro/ProMax.
 
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