Of course the switch is equally viable. I've personally bought around 75 games for it already, I can't even keep up with all the releases I want on it, from the look of 2019 that problem is only going to get worse for me.
Another big thing for me is the portability of the console, I can pick up the switch walk to other parts of the house, or bring it on the bus/train/plane easily. The ps4 is stuck in one room, if I'm not in that room I'm not playing it.
Also I just find the switch gets into a game much faster. Its start up is quicker, it's ui is quicker everything is just faster. The ps4 can be a bit of a slog. It takes a long time to start up, the menus take a while to get through, the store takes forever to get through. The switch has convenience on its side and convenience is a very powerful thing.