I simply use both. New book comes in, add to Calibre to get most metadata down pat and move to my library, then gets imported into Booklore where I can easily make minor changes/fixes and that’s it. I use Booklore for reading across many of my devices.

You could get rid of Calibre in my stack, I just find it nice for local management on my host PC.

Not sure if you also do aliases as well but I’ve seen an increase in websites flagging providers like addy.io as well. Extremely annoying that so many websites think they are so important that they refuse an alias.