I can 100 % relate to what Jonathan says: In all physical aspects the #iPhoneMini is ideal for me (not counting the lack of USB-C and high-refresh-rate screen) and I myself apply the 70mm rule the same way (very happy that the Pixel 8 is getting closer to it) but ...
... even with USB-C coming to the iPhones and high(er) refresh rates (maybe) coming to the lower tears, I fail to cope with iOS for more than a day.