95% blame on Sony. Then the Dev, LRG has no blame.
Sony is the one putting the restrictions on the Vita card manufacturing.
From what I have read, may be wrong or has changed, but Sony requires the game to be in Sony's hands before the cutoff date for card manufacturing. If the game will be a week late, Sony can't hold the cards because they have a set in stone cutoff date. And it's not like Sony told everyone about this cutoff date 5 years ago either.
They very likely knew a few months ago that they would not be able to have the Vita version finished in time for a physical release through LRG, and rather than admitting "hey, it's not going to happen, let's cancel that versions physical release", they effectively let everyone find out this week.
They could have 100% knew months ago they couldn't make it, and guess what.... maybe they TRIED to speed things up.... and failed, finally giving up and letting it go this week.
But.... no, 100% dev's fault Sony killed the Vita, stopped production of cards etc.
I like the Vita, but pretty much all blame lies on Sony for everything that has gone wrong with the Vita, including physical copies of games for the vita. The devs get a little blame, but only a small part. Why invest more time/money in a system that the manufacturer has tried to kill at every turn? Yeah they may have slowed the Vita production of the game in favor of the Switch, and that ultimately made the physical copy of the game impossible now... but I really can't blame them for it. (too much) sure they made the decision, but only because Sony urged them to go elsewhere by limiting their options.
My prediction, at some point someone will buy or make some way for vita cards to be produced again, albeit illegal and unsupported, and Dev's will "unofficially" have games released somehow on them. The Vita is popular despite Sony's attempts to bury it, LRG and others proved it.
Vita can be hacked, SD cards can be used, physical cards will be next. Vita will survive in spite of Sony.