+ the PS1.... one of the worst "reports" I have read in a while. It's obvious they have no clue how the industry works in general.
The only way I see the Switch not passing a hundred million is if Nintendo cannibalise their own sales by releasing a successor, in the same vain that the GBA would have reached 100 mil if the PSP and DS did not release early into its cycle. The GBA was alone from 2001 till 2004; I think that they still could have the same momentum in 2005 easily if it were not for the new big boys on the block. Still, the GBA pulled almost 82 mil.
Nintendo is not likely to do this, however, and whatever Switch successor in the coming years will likely be a "new" Switch than a Switch 2.