Main as traditional sim, esim for travel.

I agree that seems to be the ideal balance. Retain the flexibility of being ablen to easily swap your home SIM, but also retain access to eSIMs as a option when travelling. I still use physical SIMs when travelling as it's still easy to get a physical SIM in many countries. Dubai I got offered a free SIM at immigration(!) and in Singapore there were cheap SIMs for sale post-Security. But I imagine that there will be other countries where eSIM may be a better option.