I got a pair of Oakley transitions (Flak Jacket 2 XL) and they're perfect for me. Just dark enough for comfort (most sunglasses are way too dark IMO), and perfectly clear when cleared up. Sure they take maybe 5-10 seconds to respond, but what is this compared to? Glasses that don't change at all? Stopping and changing? Faffing about with flip ups and clip ons? Photochromics are a massive win IMO. It's much worse to me to be caught out after dark or in deep forested shade with dark glasses than squinting a little in sunlight for a few seconds.
In fact, I liked them so much I got another pair of regular, progressive photochromic glasses for everyday wear. Not so great for cycling or motorcycling though (unlike the Flak Jackets they're not ballistic rated). But I'm never again caught out without reading glasses and unable to even read a menu! Outdoors or indoors. Night or day.