Following the comments in that post I have updated and pruned the list.
I also removed all classical genres from it and will post those in a separate topic.
Here are my comments on some comments in that post:
Gamelan
“Gamelan is the traditional ensemble music of the Javanese, Sundanese, and Balinese peoples of Indonesia”
That seems to qualify it as a genre.
Merseybeat
https://rateyourmusic.com/genre/merseybeat
“Merseybeat is a light, highly melodic style of Beat Music”
So it’s a form of beat music with a distinct sound/composition style. That seems to qualify it as a genre on it’s own.
Mizrahi music
quote: “certainly legitimate but nobody seems to agree on what to call it”
Other names that I found were:
Oriental jewish music
Mizrahi jewish music
Eastern jewish music
Since mizrahi only means ‘eastern’, perhaps ‘Mizrahi jewish’ is better.
I replaced it accordingly.
Tex-mex
As I understand it, Tejano is folk oriented, and Tex-mex is rock oriented.
That makes their sound distinguishable.
If so, it qualifies as a separate genre.
Zolo
It seems valid to have some doubts on this one.
But besides RYM having 1299 releases being tagged as zolo, I see there are also releases in MusicBrainz’ database that are tagged with zolo.
https://musicbrainz.org/tag/zolo
So I’ve left it in the list for now.
.
Here is the updated list:
(only 97 more to go 
Acoustic texas blues
Adult contemporary
Afro-cuban
Afro-cuban jazz
Afrobeat
Afrobeats
Amapiano
American folk
Ashkenazi
Avant-folk
Bakersfield sound
Balkan brass band
Balkan pop
Beatdown hardcore
Bedroom pop
Biguine
Bitpop
Black ambient
Black 'n' roll
Boy band
British blues
British folk rock
British rhythm & blues
Broken transmission
Brutal prog
Calypso jazz
Caucasian folk
Celtic folk
Celtic metal
Chamber folk
Chamber jazz
Chanson
Contemporary country
Countrypolitan
Cuban charanga
Cumbia argentina
Cumbia mexicana
Cumbia peruana
Digital cumbia
Dirty south
Electric texas blues
Electroacoustic
Epic collage
Euro-house
Euro-techno
Euro-trance
Experimental pop
Flashcore
Freestyle
Gamelan
Garage rock revival
Girl group
Habanera
Hi-tech psytrance
Indian classical
Indigenous
Jam band
Jangle pop
Jazz pop
Latin disco
Latin freestyle
Latin r&b
Latin rap
Malagasy
Merseybeat
Mizrahi jewish
Música criolla peruana
Música gaúcha
Neoclassical darkwave
New orleans r&b
Occitan folk
Piano blues
Piano rock
Poetry
Pop folk
Pop reggae
Post-punk revival
Progressive breaks
Psychedelia
Psychedelic funk
Psychedelic soul
Reggae fusion
Samba-jazz
Samba soul
Sephardic
Songhai
Spiritual
Swing revival
Tex-mex
Third stream
Traditional pop
Tuvan throat singing
US power metal
Vaudeville blues
Volksmusik
World fusion
Zolo