My main question is actually more if a better supply situation would lead to a Switch 2 faster than in this timeline.
That's so tough to say. Even without shortages and typical production (not unlimited Switch hardware, obviously), the earliest I would see the Switch 2 releasing is November 2022.
In our actually situation, Switch 2 probably launches in November 2023 or March 2024. November 2024 isn't even crazy, though I don't see it taking that long.
Lifetime Sales Predictions
Switch: 144 million (was 73, then 96, then 113 million, then 125 million)
PS5: 105 million Xbox Series S/X: 60 million
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima