8th gen dedicated portable gaming just lost a lot of luster. I have a Vita (as well as a PSP, 3DS, Switch, etc.) and I carried them everywhere I go. In the case the 3DS and Vita, by the time I finally tried to play a game, the batteries were dead. I do/did play the Switch* almost every day though.
What I'm saying is that portable gaming isn't what it used to be. The console market is the bigger picture. It's the industry. Sony's success with the PS4, especially versus more opponents, is more relevant.