I like the feeling of holding and using a phone in one hand. I am using a Pixel 5 right now, but it feels a bit too large for me. I know nobody makes phone that small like the iPhone 4S or the Samsung S3 mini anymore, but is there at least a phone smaller than the Pixel 5? Maybe around the size of a iPhone 12/13 mini?
EDIT: There is a small Android phone project in development for anyone interested: https://smallandroidphone.com/
OS update is less of a concern to me. If the phone is from a major company, there will be custom ROMs like the LineageOS sooner or later. It will last me a good while before becoming obsolete as long as the SOC is good enough.