I’m not a saturation diver, so I’m not using the helium escape valve anyway. I think it’s a novelty at this point for most dive watches
With the Pelagos depth rating I'd expect a helium valve, I think? Never dove deep enough for helium, decompression chambers, etc,...as a matter of fact, never got all that comfy diving and went into far safer aviation maint., where of course I ended up early in career having to suit up in a coverall with mask and external air hose due to toxic fumes.