My own two cents: I became aware of the project some months ago and purchased a phone both to see what it was about and support the project. I’ve used it both on T-Mobile AND MintMobile. There have been some instances where I’m told my phone goes direct to voicemail or a text is extremely delayed but for the most part the “dumb phone” feature work fine. I had to do some playing around with my Google cloud messaging/VPN/battery/data saver settings to ensure constant notifications but other than that, works fine. I’ve also manged to cut down on the amount of apps I have installed and find creative ways to use FOSS to accomplish my needs.
Banking seems to be the Achilles Heel. Most of what I really NEED (Navy Federal, USAA, etc) and a few other “wants” can be found via the Aurora Store, but I’m wary about that, and even with that, Venmo (which a lot of my friends use) and Vudu (my primary video streaming service) simply do not exist. Neither do play store purchases, which means the functionality of a fitness app I paid for is severely curtailed. I read an interview stating /e/ is hopeful all apps become available via the Play Store in 2021. I’m hopeful as well.
Of note, I’m super happy with the Easy Installer Snap as well. I nearly bricked my S9+ and had to run it through the easy installer to fix it. It was no trouble whatsoever, a far cry from back in the day with Cyanogenmod.
If you’re willing to change your thinking slightly, /e/ can absolutely be a daily driver. In fact, the S9+ is my daily driver and the S9 is my backup.