Sony has twice tried to make a handheld work, twice did fantastic with hardware with features ahead of its time and then... nothing. They immediately give up. I loved the Vita and see the Switch as basically Vita 2. A bit more work and that could have been yours, Sony.
I would love for them to get into a handheld fight with Nintendo, as both Nintendo and Sony put out much more quality stuff when they are trying to prove themselves against someone and both have been coasting in their corners for a while now.