Earlier quoted context omitted.
> "help, I'm being detained in Paris!" "I was mugged and need a passport!" And they conveniently let you keep your 1000$ iPhone ;). But these are all situations where I could just make a regular call with my dumb phone as well. Sure roaming costs will kick in, but that's even worse for data. My current provider charges 2€/min for calls outside the EU and 1€ per 50kb (yes that's not a typo). In all seriousness though,…
You can buy a cheap prepaid sim, and save yourself from data roaming tariffs. And it is the moment when smartphones shine - you'll have the same IDs/handles/usernames in messengers. With a feature phone your identity (your number) will change.
Since this drifted somewhat away from the original topic let me add that I'm quite curious about KaiOS devices as it seems it might offer a suiting compromise for my needs. It got most popular messenger apps so I could take advantage of improved connectivity with people but the experience is still limited enough to prevent information overload and playing around with it too much. The selection of devices is just too limited at the moment.