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Note that even if you start with an integrated wifi/router you can always by a stand-alone replacement for one function and continue to use the original unit for the other. For instance, I use my ISP supplied wifi router as a router and turn off its wifi, then use mesh wifi for whole house coverage.
We bought phones that support eSIM because we do a lot of travelling. Canadian mobile companies charge usurious rates for roaming: $15/day! Times two phones. I can get 2 weeks of data only for Europe for about $11 total on an eSIM. With voice it goes up to about $25. Total.
It has changed our lives when we travel.