Hello Games' Sean Murray has taken to Twitter to announce that a PC patch has been released on both GoG and Steam. The patch for PlayStation 4 has been submitted for approval and should be out "very soon".
Murray reports that less than 1% of players are submitting support issues, but that 70% of those problems should be resolved in this patch. Most notably, the PC patch "adds support for more hardware + improves frame rate at low specs. PS4 improves stability + lots more".