I’m a longtime Lightphone owner - but not a longtime user. Why? In most places outside of North America, WhatsApp and Signal are the only methods of communication people use. Brazil (where I’m currently located) basically runs on WhatsApp.
I love the idea of minimalist phones, and have ordered several. But none of them seem to take messaging seriously.
I would suggest integrating Beeper as a way for Mudita to make the next generation of phones viable in Europe and South America, where SMS is almost never used. Without it, minimalist phones become an additional piece of tech to manage rather than a better replacement for what came before.