I feel like this is gearing up to bring back contracts or phone locks, in a way. A family member recently bought an iPhone from the US to a non-US country, without realizing that the US models are eSim-only. They have to change carriers because only the fancy, expensive carriers offer eSim. I would not be surprised if they find other ways to make it harder to install an eSim in a different carriers phone.

Also, another thing I hate about having an eSim is that it sorta forces you to install your carriers app, which for some cheap/mid-tier carriers is an ad-infested mess.