well, it's been a while since I updated this. I did have my 13 Pro Max listed for sale for a while, but I was getting some truly silly offers. I was waiting until eBay did their fixed selling fees offer before listing it on eBay (FB Marketplace is pretty trash in my experience anyway).
but last week my girlfriend managed to convince me to keep the phone. No point going back to something older / that won't last as long. I might as well just stick with this now. That's what I'm going to do.
as of today, I suppose it is 'the best' experience Apple delivers in your pocket. If I can make it last 5 years, then it'll have been a fairly cheap endeavour. Longest I ever got an iPhone to last was an iPhone 5 for 2 years (and I'm not proud of that, I think 4+ would be ideal)