For me it’s the notification light you used to find on older phones, was particularly good to know if your phone was charged without picking it up
Physical keyboards. I want a modern Blackberry that actually gets some half-assed OS support. Unihertz Titan was a neat one but had some quirks.
How hard is it to get into the phone game in terms of regulatory stuff? Like if I had the device designed and manufacturing ready to go, what legal hoops would I have to jump through to become a phone maker?
Is it a closed space? Can I enter it? Do I need to register with FTC or get other huge corps to cooperate with me or anything?