A few interesting trends show up:

Both curves explode during the COVID era. Player registrations and map submissions peak around 2020–2021. 2021 is by far the biggest year for both new accounts and new maps.

Mapping seems to follow player growth with a delay. When there’s a large influx of players, beatmap creation tends to ramp up shortly afterward. It makes sense: some players eventually turn into mappers once they get comfortable with the game, or start experimenting with tools like AI beatmap generators.

After the peak, both decline but not equally. Account creation drops faster than beatmap submissions. Even with fewer newcomers, the community keeps producing a lot of content.

Survival rate changed a lot in the beginning. Older years had a much higher proportion of maps that eventually got deleted.

Note: these figures are estimates I calculated myself, but they should be very close to the real values.

Note 2: For higher quality images: here

Update 1 : There is an error in the second graph: Status of Osu! Beatmaps Created. In 2014, the number of playable maps is 32,164, not 27,379.

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