I started using track presets about 5 years ago after spending over a month building a template with 2500 disabled tracks only to discover a bug in Cubase whereas the midi input would be lost when you re-enable each track.
That bug has since been fixed but it compelled me to not waste all the effort and I proceeded to save track presets for all 2500 tracks.
One thing that's really cool that I haven't seen mentioned is that you can also save multitrack presets. You just select multiple tracks at once, right click on one of them, and save track preset. So I have track presets that contain for example all of my violin Longs, all of my violin shorts etcetera.
Unfortunately, the database has been defective from the beginning. In 10.5, it seems to be a lot better, with less freezing and other issues.
But the unreliability has led me to avoid the database as much as possible, so I don't use any of the metadata or any of that part of the database functionality.
I merely organize everything into folders with a hierarchical structure the classifieds instrument types, like strings brass Etc, and then subfolders with the different instruments and their articulations.
These folders which you can access from the media manager are actual Windows folders so you can open them in Explorer and perform edits and reorganization and various other functions without having to use the database at all.
Once you're back in Cubase, open the database and refresh and any changes you made from within Explorer will be reflected.
Another benefit of just using the folder system is that it's really fast. I probably create a new track preset every time I open Cubase. I have them for my orchestral libraries, my guitars, various other instruments, vocals, mixbus, etc etc Etc. and lots of effects.
I can find them all easily because they're all sorted into their little folders and they're named carefully.
I also create dedicated folders of track presets for specific projects. This is fairly useful cuz sometimes I like to steal track presets from one project to reuse in another.
Oh yeah, the thing I really like about multi-track presets is that I usually write in my head, play in the part, and then surf around for the best library for that part.
So once I playing my part, I can load for example all of my legato violas and then drag the midi part to each one to see which one fits best. It might be a weird way to work, but it works for me.