Would you buy it if it was called PSVita 2??.
The Switch is the most powerful handheld ever made, merging the best of what Sony was trying to do with the Vita and what Nintendo has been doing with the 3DS. Its like the Dream Portable system.
It is funny when I see Sony fans so down on Switch as it is essentially a Super-Vita in addition to a Wii/3DS successor. It even has a lot of Vita games like Disgea 5, Setsuna, Binding of Isaac, etc. And will probably have Vita devs making games for it as the handheld is now several years old with no signs of a successor.
But you know, it's Nintendo so some are just inherently not interested.