You can buy phones with non-embedded batteries but they suck. That's not a coincidence.

What is your hypothesis for why more phones arent designed with non-embedded, directly replacable batteries? If it's such a highly valued trait in a phone, why doesnt some company just gobble up that market share? Why havent existing solutions sold well? Mine is that consumers dont actually value non-embedded batteries when accounting for all the tradeoffs. What's your hypothesis?