Ironically it's the games where there's money at stake that have the cross-saving. I was going to buy on both Xbox and PS5 anyway and cross-save is a nice shortcut for achievement and trophy hunters but hopefully this game will be good enough to savor twice without a horrible grind.
A new Crimson Desert FAQ confirms no cross-save, an internet requirement for the day-one patch and initial setup, and launch support for consoles, PC, Mac, and GeForce NOW.