Not everyone has that option. For my carrier I have to call them and ask if they can help me set up esim each time because I can't do it myself. And each time it takes at least 30 minutes. Plus I just don't trust esim yet, it hasn't been able to shine as a technology. Give it a few years, I'm all for esim, but we have to make the switch gradually. Give me both for now and keep physical sims alive for the next 7+ years to get everyone onboard. By then the process for getting an esim will have gotten waaay smoother.

Sounds like it would be trivial to compromise your phone number and sms 2fa

How so? The carrier can issue new SIMs anyway, nothing I can help about, it's a trust or get fucked system.

Password to Flex itself is in my 1password db. If that gets compromised I'd have way bigger problems than cloned phone number.

That also makes it easy for a hacker to steal you phone number

Lucky for you, but I don't have that option. I also like having the ability to move a SIM between my 5G CPE and my phone. Not gonna replace a 2 year old, €700 CPE just to try and chase eSIM dreams.