I've been thinking about this lately again & since this is an open topic for genres as well as instrument tag use in MB, and in my mind it would be neat to have this:
https://getmusicbee.com/forum/index.php?topic=21629.msg126937#msg126937
for instruments as well, i.e. a user definable way (via separate xmls so it can be shared and multiple classification systems could be created/switched between (depending on user preference/needs), to allow visualizing these taxonomies/relationships within MB:
https://en.wikipedia.org/wiki/Musical_instrument_classification
i.e. standard western classification (based on an idea for additional Thumbnail Browser functionality, i.e. to enable visualizing group/relationship views)
[-] Brass
Trumpet
Saxophone
etc...
[+] Percussion
[-] String
Viola
Violin
etc...
[-] Woodwind
Flute
Duduk
[+] etc
For instruments it would be nice to also allow double-/multi-classifications within the same system (which came up in the genre discussion as well...)... eg. have an Alto Saxophone listed under brass as well as single reed grouping, whereas eg a Duduk would be Woodwind & Double Reed....
Just my few cents as it would be nice to have tools to deal with complex taxonomy/grouping/relationship based views in better ways (and I'm hoping for MB to achieve this at some point).
Also, for more modern music, it would be nice to also add electronic gear to this as well...i.e. synthesizers, physical as well as VSTs, FX units, and more obscure studio gear that contribute to sound / are credited / listed in metadata (I have a hunch, but only time will tell, and this is probably ways away still - would be nice if tracks on discogs could be linked to gear on https://www.gearogs.com/ as well...).
Cheers.
c.