I change carriers so incredibly rarely (way less than once per decade) that I've never even considered that as an annoyance. Even if I did switch carriers, I can't imagine that I'd have found it to be much of an issue, switching carriers isn't exactly urgent. And the one-time cost of a new SIM is really low.

But I will admit that it's a potential advantage of eSIM. If you do switch somewhat frequently, I can see it being convenient (assuming all the technical stuff works out).