eSIM instead of buying physical SIM cards

I’m planning to travel through a few European countries over the next couple of months and I’m considering switching to an eSIM instead of buying physical SIM cards in each country. How reliable is eSIM coverage compared to traditional SIM cards, especially in rural areas? Also, how easy is it to switch between different data plans if I move from one country to another? I’m curious about real-world experiences—are there common issues with activation, compatibility, or unexpected roaming charges that I should watch out for before making the switch?