Also some services straight up refuse to send SMS to cloud phone providers meaning you can't sign up for certain services that needed a verified phone number (unless they had an option to receive a call with the verification code which worked like 25% of the time).
Dialing was another huge issue, you can somewhat intercept outbound calls on Android but the system is buggy so I had to find other methods. Since I had integrated my SMS/MMS messaging with Slack (one slack channel per phone number) I created a /dial command that would call my phone and then when I answered it would transfer me to the person I wanted to call.
Happy to answer more questions about it but I highly recommend people think about all the consequences before moving their main number over.