It's not been that accessible for pilots of light single helis though - I think that is his point, 'amateur' owners looking to push on in poor weather using synthetic vision.
It is becoming so. Widely available on Garmin EFIS models, so commonly available on the likes of B407, B505 etc. Add to the now widely available HeliSAS stabilised autopilots and it's a VFR pilot's temptation into IFR.