I think when you put sales of Witcher 3 on the Switch it into the context that it sold as much as the XBOX1 version and almost have the PS4's in 2019, it's actually quite good, especially that it was full price at that point.
Sales of #TheWitcher3 by hardware platform (units sold)
— DarkDetective Nathan (@DarkDetectiveNL) April 8, 2020
Pixel counting from this graph gives rough results per platform:
PC: ~12.4m#PS4: ~10.8m#XboxOne: ~4.3m#NintendoSwitch: ~0.7m
Total: ~28.3m pic.twitter.com/RkQUtYsxzg