Software sales after 3 quarters: (Attach rate in parentheses)
GBA: 21.80M (2.28)
GCN: 14.37M (4.25)
DS: 15.82M (2.38)
Wii: 44.82M (4.83)
3DS: 17.56M (2.63)
WiiU: 14.44M (4.00)
Switch: 27.48M (3.60)
Switch has a higher attach rate than all of the handhelds, but a lower attach rate than all of the home consoles.
However, bundled software is counted in these numbers: Wii Sports inflates the Wii's attach rate by at least 0.8, and Nintendo Land has a similar effect on Wii U. Not to mention how GameCube, Wii, and Wii U all went through a holiday season in this period, while Switch did not.
For reference, Wii sold 15.98 million units of software in its second and third quarters (Jan-June 2007), while Switch sold 22.02 million units of software in that period (Apr-Sep 2017).