Wellp, it’s not like they suddenly stopped working or anything…
I still have quite a few L2M hosts, I could open up Fasttech America with all the pills, stars, drivers, etc., that go into drop-ins, so I could still throw together quite a few drops-ins even in UV and pink if I wanted to (like my purple ’501 with 365nm UVLED).
And that’s not counting the actual good quality ’501s and ’502s I have (ie, before they turned into le chit in that race-to-the-bottom a few years ago).
Hell, I even have a few NexTorch nylon-body drop-in lights.
Y’all have to remember that we didn’t all “need” 2000lm lights barely bigger’n the cell powering it. My plumber still has his ancient battered Angry Blue™ drop-in light that squeaks out maybe 200lm with a most annoying low-voltage blink, but for him is just fine for looking behind boilers and under sinks. I even offered him a choice of lights, even with usb charging (he was using ’123s), and he just wasn’t interested. What he had was fine for him.
Of course, his assistant was floored by the bright blanket of light from my Cometa, but I wasn’t about to sell that. 
So maybe new development in drop-ins (both the actual drop-in and the hosts) might be a dead-end, but the lights still live on.