I tried to explain Calibre to someone else and an analogy I came up with was "iTunes for ebooks" which I found to be quite accurate.
If Apple breaking up iTunes into different apps gives any hint about the shift in the way people manage their devices and contents and the general trends in software development, Calibre is probably not the ideal way for managing ebooks in 2023.
(I started using kindle in 2011 and have been a long time user of Calibre, although I have used Calibre much less -- almost never unless I have to)
Even a readonly version is very useful. The tree-based file browser on the left and in-editor navigation are helpful for browsing the code. Recent github updates added a tree to the file view, making this less important, but the vscode experience is still superior.
If Apple breaking up iTunes into different apps gives any hint about the shift in the way people manage their devices and contents and the general trends in software development, Calibre is probably not the ideal way for managing ebooks in 2023.
(I started using kindle in 2011 and have been a long time user of Calibre, although I have used Calibre much less -- almost never unless I have to)