Comment by onli

You shouldn't be downvoted. It's exactly the problem. My main factors are: Replaceable battery, headphone jack, LineageOS (or other custom rom) support. If those are matched the smaller the better - I loved my HP Veer, which I admit did not meet these requirements - but without them size is not the main factor.

Those additional requirements further splinter the market.

But what's the point in buying a small phone if it does not meet these standards, which are all about longevity? Then it will just be unusable in ~2 years. Which would make it no better than the otherwise perfect small phone I already have at home, the Veer.