I'm just talking out of my ass here but cloud streaming is probably more cost-effective than porting them over, which is weird as I feel they'd do really well on the Switch.
And I was met with scrutiny the other day when I said square enix didn't want to put even the barest minimum effort in to bringing their 3d action games to switch.
Not even bothering with a proper release of the PS3 ported games, lol.