Accessory are optional Custom Roms are possible and already in the works (and /e/ already available.) that is more a community thing. Headphone jack is a feature that has a (i suspect) minority that tends to be real loud. I had my Fairphone 3 for almost 5 years and i am not sure if i ever used the headphone jack. Dual Sim is possible with E-Sim, plus SD card. Dual Sim with SD card takes a lot of space. Fairphone moments switch is already customizable to: DnD, flight mode, flashlight, dark-/ light mode, batery saving mode. Not sure what you mean by firm USB 3.0 is a sad decision which doesnt affect me personally but would have been great to have for DP alt mode. For moving files i use Quickshare cause it is much more convenient.