How many official art styles are there?

[NanoRuby]

Hey everyone! I'm working on a little project involving all the different official pony art styles, and I've come across a bit of a problem: there are a lot.

Some of them are so similar that I wonder if they should even count as a separate art style. Like, is the G2 box art different enough from the G2 comics to be considered different? What about the g3 box art and the early g3 specials? All the different styles used in G1? Should the g3 pixel art video games count?!

Here's my list so far. What do people think? Any art styles that I'm forgetting or that should be combined into one?

And what are people's favourites? I've recently become fond of the g4 manga style, it's just so cute!

Early G1 box art
Mid G1 box art (similar to early box art but a bit smoother and more refined)
Later G1 box art (Family Friends, Hair-Do ponies, etc.)
Early G1 commercials (and colouring books?) (Like this
Other early G1 commercials [Like this)
G1 specials (Midnight Castle and Katrina)
G1 Friends
G1 Tales
G1 Retro Vectors
G1 UK comics
G1 Italian Comics
G2
G2 but with smooth shading? (Friendship Gardens cover and some merch)
G3 box art and later specials
G3 early specials
G3 flash games??
G3.5
G4
Wonky early g4 vectors
G4 Movie
Pony Life/G4.5
G4 comics (difficult because there are so many artists)
G4 manga
G4 Tomodachi wa Mahou
Pointy G4
G5 3D
G5 2D
G5 Tell Your Tale
G5 Intro with the Mane 6

and an honourable mention to:
Every single art style they went through in G5 concept art

[Shaiyeh]

for g3.5, don't forget the Newborn Cuties videos. I'd classify that as its own artstyle!

[DorkLarue]

There were also G2 commercials that utilized 3d animation!

[Moonbreeze]

Some addittions (if they count). I can find you some examples

G2 - comic UK Style (I think is just a bit different. You have the original clip art style but also the art on the boxes/ file cards which are just a bit different as well)
G2 - Annual book style (quite similar as well)

But quite different:
G2 - Early French comic style (which is... yikes)
G2 - Late/ General French comic book style