If you want convenience, Google Books is pretty solid. Just make sure you have all of your books and are only uploading to Google. If you buy from Google, you’ll run into the same problem. I organize via Calibre and use it to push to both Google and a Kobo.
I personally have all my ebooks and use Google Books to read on all my devices. It’s more convenient than trying to self host stuff. When Google eventually drops Google Books I will have to figure out what to use.
Wait what
AWS, GCP, and Azure run on virtualization. Do you think all these cloud providers are providing everyone bare metal? This doesn’t include containerization which is a subset of virtualization. Your average shop might not run virtualization directly unless of course your team touches VirtualBox or Vagrant or qemu or (probably shouldn’t) HyperV.
Either your understanding of virtualization is very lacking or you didn’t explain your point very well. I am really curious what you meant.