Speaking as an Apple user here with a phone that does dual SIM (one physical and one eSIM), but I currently prefer the physical SIM for my primary number and eSIM as I need it for data.
For the last 18 months I've had it the other way around (eSIM primary) and I needed a data SIM with a different provider for a weekend cause I was somewhere with bad coverage on my main provider.
Getting a prepaid eSIM was very easy, but it decoupled my main number from iMessage since the eSIM slot was now linked to a different number.
So now I'm working off the theory that since I can generally get an eSIM for any country I might visit reasonably easily (the App Store has a couple of different eSIM providers), it's better to leave the eSIM empty until I need it and rely on a physical SIM for my primary.
It's not the cheapest way to go about it, but definitely the most convenient, and doesn't rely on you having to try and obtain a SIM locally (which can be very easy to very challenging depending on what country you're visiting).