It would become very easy if they realized that a lot of users who buy a Linux phone would probably be happy to trade thinness for battery life.
I’d even go as far as saying that even with Apple’s efficiency and all, I’d still prefer it if they had bigger batteries.
And those are a lot thicker. Maybe Librem should not try to compete with Android and iOS at all in terms of design and just go for “privacy by default” as their campaign. (If they ever sort out delivery problems)