I don't understand this eSIM only trend. eSIM sucks for switching your service between devices or for travelling to countries where eSIM isn't a thing yet.

which countries are esims not a thing?

China, central Asia, etc

pretty sure you can get an esim in china

You cannot get an eSIM for a Chinese phone number as a tourist; this is a restriction set by the Chinese government.

yes, but only on Chinese regional models