Been a while since I've used Drive as my main option and this may have changed but one thing I hated and why I switched back to dropbox was this.....
I have a lot of data so when I build a new machine, get a new laptop, or reformat instead of letting the software download all the data I like to copy from backup to the proper folder. With dropbox it will check the data, compare to the cloud version and be done. With drive it always got confused and would end up making duplicate folders. Again this may have changed but it drove me crazy.....
As for the pixel 2 I have one as well and love it. So I am using drive for the unlimited photos. Other than that I have the dropbox app and can access all my docs etc easily on my phone.