The situation is not so dire thanks to manufacturers making reliable PS VR1 camera adapter clones. Even after Sony stops shipping adapters, PS4 VR gamers won't be left without solutions.
DualShock 4 (for PS4 games), and licensed peripherals (e.g., fight sticks) work on PS5. However, PS VR needs a Camera Adapter, and PS5-exclusive games require the DualSense controller for features ...