Gaming PC (PC games plus emulation of most systems, including Android and arcades)
2, 3, and 4. Some combination of three systems with large exclusive libraries for which emulation isn’t quite there yet or have unique features that make emulation suboptimal (Sega Saturn, Original Xbox, Xbox 360, Wii U, PS3, and PS5 come to mind)
Also just due to sheer age, which makes it the platform with the most games period, dating back to 1995 in terms of games you can play on modern hardware without an emulator (I know it’s getting harder to run Windows 95/98 games now but it should still be possible with effort for a lot of games, unless Windows 11 got rid of something)