When I graph the median sales estimate against the total number of games released on Steam you get this chart. (6/10)

That chart is an almost econ 101 text book version of the supply / demand curve. Look I found this one online and I swear the curve color match was a coincidence. (7/10)

Now I am not saying don't make platformers (I make them!) I am just saying that you should be aware of the scale. It's a joke that all indies are platformers. It stopped me cold when I saw how many more there were than any other genre and how low the median sales were(8/10)

If you want to help clarify this data, I am running another survey of the Steam Autumn Festival to see wishlists and genre. If you had a game in the festival, please fill out this survey: https://forms.gle/YPt75Ag5Mn75snXp8

You can also read the full writeup of the data here: http://howtomarketagame.com/2020/10/19/steamgenres/