I haven't watched a 3D movie in cinema in years.
At home my main TV (2016 4K) is 3D capable but the active glasses were optional so I didn't bother to pick them up. My 2nd TV I do have 2 pairs of active glasses but I've not used it for 3D in years. I was using it for 3D gaming with my PS3 but when I upgraded to the PS4 Sony seemed to drop 3D gaming.
However just recently I've used my PSVR headset to watch a few of my old 3D blu-rays. This is probably the best way to watch 3D movies in my opinion.