I don't think a digital only version of a switch is possible because those who already have physical versions of previous games would have to buy them a second time as a digital copy.
Not nintendos problem, if you bought it physical, and want to play it on a digital only console.
You ll just be told "too bad, not our problem, buy it again" (sell the physical to cover costs if needed)
Necro-bump this 2020: http://gamrconnect.vgchartz.com/thread.php?id=229249
Bumb in 2021: http://gamrconnect.vgchartz.com/post.php?id=9047071