[Quoth]

I've no shorts, jeans, trousers, shirts etc that take any 5″ or larger ereader. I've only one jacket that will take even a 6″ Paperwhite 3 and it will take the 8″ Sage.

I'd never keep a phone in a jeans pocket. I know someone that did and twice they have broke the screen acidently walking into a bollard, but the main reason is that phones are now too big.

I think choice is good and sadly due to Eink Corp virtual monopoly there is poor choice of screen sizes and with phones there is too much dominance of "fashion" and the different ones are either dumb phones or horribly expensive. My favourite phone was the N9210i, but I had to give it back when made redundant.