YMMV but in my experience, instances where you need to provide a physical signare but are not provided a printout are pretty rare. Rare enough that you can use a printshop or similar service.
Bording passes are are almost always provided for you on check in for international flights (all you really need is your passport). And honestly I can't recall my phone battery ever reaching 0% - then again, battery lifetime is one of my primary criteria when choosing a new phone. There is still some risk that the phone blows up (literally or figuratively), but that's getting into theoretical territory.
I do have a printer for convenience but it's rare that I actually need it and I have lived for long stretches without one.
Bording passes are are almost always provided for you on check in for international flights (all you really need is your passport). And honestly I can't recall my phone battery ever reaching 0% - then again, battery lifetime is one of my primary criteria when choosing a new phone. There is still some risk that the phone blows up (literally or figuratively), but that's getting into theoretical territory.
I do have a printer for convenience but it's rare that I actually need it and I have lived for long stretches without one.