Also a lot should be based on what you like to use in sim racing, while back i binned all of my F1 mods, including RSS ones.
Its mamothly dull in real life and even more dull in a game (IMO).
Obviously if your a massive fan then (royal) your opinion differs and I'm cool with that as you should be with mine.
As I've converted more stuff I've deleted other stuff i don't use, rally tracks all went for example.
Just do what you want basically based on what you like, and if you have the storage just store it up.
Every so often i bin a bunch of stuff but mainly as its a type of car i don't like, then there is stuff like the DRM mod that stays there because the cars are cool, but they always without fail disappoint me when i race them.
I really should delete them.
Something else i'm keen to do these days is like with rally stuff, i load up DiRT, or open free roam Forza horizon etc.
This helps for me, to remove stuff that is just filler that other games do better.
This struck me when i was converting a plane into AC... and then i loaded up MSFS.
Just because you can, doesn't mean you should...
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(BTW only quoted your post masscot to keep some continuity)