Questions about Onyx Boox Max3

Ok.

Yes, the device even comes with a USB-C to USB-2 adapter :-) In addition, an adapter USB-C to micro SD card is also included

The delay when writing is within limits, i.e. no problem for me. Otherwise, Android 9 is on the system, i.e. you can install and run all apps from the Google Store. So far, I haven't had any restrictions, so I think synchronisation goes without a hitch. In my case, I use the synchronisation with my private cloud service (Owncloud) on my server without any problems.

Not really, but as long as you don't have to turn in a presto, it should work. Maybe you can also adjust that. When turning the pages of a newspaper, it goes relatively smoothly. If you know the composition of the first few bars on the next page, it should be enough. Anyway, Books is also recommended for orchestras as a sheet music substitute.

Onyx Boox Max3 already has this function integrated. Or are you not satisfied with it?

Not good. With 3rd party apps and pen input there is usually a 'delay'. However, the native note app works great. Notepads within the native app can be synchronised with OneNote, which works quite well.