I'm on 99% with a 13 PM from March 2022. It is the only phone I have used in that period.
That's very good! I purchased my 13PM a month before you and I'm at 94%.
Just as a general side note, I guess it's important for people to not get too bogged down over the bat %. Also Apple can replace your battery (for £89 2-3 years ago, not sure what price is now) instead of purchasing a new iPhone.
I see people get concerned over their bat% a lot, especially on Twitter and want to upgrade to a new iPhone, this being one of the main reasons.
iPhone 15 being rumoured to have Titanium and softer/slightly curved edges will be a nice touch and having 30% smaller bezzle will be nice too, plus usb c, button replacing the mute switch etc.
Several people who own the iPhone 14 Pro have said the Dynamic Island a bit of a gimmick, which I can understand too.
For me the 120hz display was the game changer for me when I bought the 13PM, and I intend to run it to the ground, great all round phone! Just like the 14, the 15 won't be a significant upgrade.
The flip side is the 13PM trade in value will naturally reduce, and keeping with Apple's trade in is a good way to keep the cost of upgrading cheaper than it otherwise would be.