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It depends on the kind of riding you do. I do a lot of short journeys at any time of year and any time of day so not having some kind of shade for low sun or intermittent bright conditions is a proper pain in the ass.
On longer planned trips I had made do with changing from glasses to sun glasses but I could write a list of times where it would have been safer to have an internal dark visor which is why I started buying lids with them in. I know a biker who ran into the back of a flat bed truck because of low winter sun!
For me the full face helmet without internal visor was perfected in the early 90's. I had an Arai in that period that was near perfect.
The chin bar really is the making of a helmet, for some reason. Loads of people seem to love the Bullitt (if the fit suits their head) for the huge amount of peripheral vision, which results in that tiny chin bar.
Somehow I’ve managed never to have a helmet with an internal sun visor, I just stubbornly get annoyed about altering light levels. I imagine if I’d had one, I’d feel differently about choosing a helmet without.