Earlier quoted context omitted.
Realistically when was the last time you switched your SIM card? I only change it when i change phones.
Last time I was in SE Asia it wasn't uncommon to see people carrying multiple SIM cards. They were sold cheap and providers were constantly undercutting each other on mobile data. This was almost a decade ago now, but given how Asian variants of phones still have dual SIM slots I'm guessing it's still common.
Discloser: I sell eSIMs.