The only thing I can think of is that they were refocusing their games division around the PS4 to reclaim their space in the home console area after the disaster that the PS3 was initially taking advantage of the initial failure of the Xbox One.

PS Vita and their owners were just a collateral Sony was absolutely willing to sacrifice.

Just feel like I should at least add two more things here:

1. Storing information do their customers as plaintext data, then getting hacked and losing all that information (infamous PSN hack);

2. Releasing a portable console that cost between 250 and 300€, promising support for it then 2 years in, give up on it, never officially tell customers, but have one of your higher execs tell the press said console is a great “accessory” for the PS4.

This is why I don’t personally buy Sony hardware.