My day one experience with Split Fiction:
Buy game on steam, no EA launcher requirement 
Download on Steam deck & PlayStation, because my co-op partner uses ps5.
Launch game on ps5, it asks for an EA account which my patner doesn't have. Create account
From steam deck, send friend request to new account. EA won't load the username search results so I can't send it.
Install EA Connect on PC, send friend request from PC.
No way to accept friend request on ps5 in game. 
Sign out of my EA account, sign into my friends on the PC to accept friend request.
Launch game of both platforms, select play online.
Forget that PlayStation requires payment for online play. 
Give up, dock steam deck, pair controllers, play.
I wish games still let you host servers. 