Yikes! Are you joking or do you still have a system that's equipped to play 3D Blu-rays? I have around 175 of them in my library and absolutely no way to play them. When my last plasma TV died in 2018, so did my ability to play 3D Blu-rays. Its demise coincided perfectly with the U.S. television industry abandoning the format and removing the functionality from all new TVs. It's really sad, too, because when authored correctly and on a calibrated display, the experience can be akin to an enthralling Quadio or 5.1 surround music disc. Just like with SACD, DVD Audio, etc., there are some revelatory 3D Blu-ray discs that serious videophiles still collect.
I appreciate your post because I too plunged into the deep end of 3D blu ray, and YES, it's the video equivalent of quadraphonic, except that quad came back via stealth in 5.1 HDMI.
I have 100+ 3D titles, and predictably, the 3D quality ranges from mediocre/poor to jaw-dropping EXCELLENT. I understand why 3D didn't gain mass acceptance, the glasses are fidgety, batteries in active shutter glasses fail, and the 3D picture darkens significantly once AS glasses activate, AND as a practical matter, most viewers don't want the hassle of committing to 2 hours watching uninterruped with dork glasses on. However, for me, just like with quad, the enhanced effect of experiencing movies in 3D, just like we experience daily living in stereo vision, is worth the stretch. YES, "Dune Pt " got released in 3D, but NOT Pt 2. I guess we 3D fans can only count ourselves lucky the studios chose to release Pt 1 in 3D at all.
I'm anxious to see whether or not the next batch of Marvel superhero movies get 3D release. Even recent underperformers like "The Eternals," "Black Widow," "The Marvels," and "Black Panther 2" were released in 3D, although I had to pay dearly for Japanese imports for some of them. (I found a couple "no frill" releases from an E-Bay seller in Sri Lanka, certainly better than nothing, but paying up to $100 for a Japanese 3D import was more than I could bear for "The Marvels" or "BP2".
We're definitely living precariously trying to keep our wheezing 3D flatscreens working. Used 3D sets can be purchased online, but that's a TREMENDOUS (and EXPENSIVE) leap of faith, not only to get a fully functional set, but also to find a shipper who can get it delivered intact. YES I think there are still 3D projectors, AND the new Apple headset IS 3D capable, but a projector just isn't practical for me, and I'm uncertain whether an Apple headset can be integrated into my existing system.
I'm reasonably future proofed to continue having 3D capability in my rig, but I think I've just about maxxed out what's practical. I think 3D MIGHT stage a comeback if glasses-free technology can be developed, but my opinion is that it's in the same category as self-driving cars, a mirage for now, pending some giant tech advance we can't forsee from today.
Two movies that never got 3D blu-ray releases that top my wish list: the 2017 "Total Recall" remake with Colin Farrell & Jessica Biel. This one DID get a STUNNING 3D theatrical release, but NEVER got issued on disc. Second was "Tomorrowland," which clearly WAS produced to ve a 3D showcase, but as the 3D box office wilted, they only released the "flat" version. TOO BAD! This truly would gave been an EXCELLENT 3D demo disc.
Viva 3D! Thanks for reading...