Aye, was thinking that as well, the Switch sold more than every other system combined... and that includes the nearly 20k 3DS's which are also Nintendo owned, the popularity of the Switch could really hamper titles going to the ps5/neXtBox imo because over the next 18 months the ps4/X1 are going to die down an awful lot while it seems that the Switch is set to continue on this pace for at least the next 4 months if not grow with the new revision and Pokemon for Christmas, just means that by the time Sony and MS are dropping their 10 Teraflop next gen machines Nintendo is going to have roped in an awful lot of devs creating games for their little.... what .5Teraflop machine? Tough to convince a game dev to put the work into a game to make use of 20x the processing power and create 4k textures and 7.1 audio when you have a machine like the Switch which works just fine at 720/900/1080p assets and is selling a million units a month.
Honestly, I think Switch and PS5/Scarlet are such different products with such different value propositions that they won't harm each other. I mean, the massive success of the Wii/DS didn't stop devs making HD games for PS3/360.
Bet with Liquidlaser: I say PS5 and Xbox Series will sell more than 56 million combined by the end of 2023.