I still prefer my canister light for a lot of the reasons already mentioned. I am still using HID lights which are "ancient" by today's standards but I vastly prefer the beam of HID in murky or turbid waters. The only LED beam I actually like is the Focus but not willing to pay the Halcyon tax for one when I already own 3 canister lights. The new UWLD beam is also pretty good. I borrowed one of
@tbone1004 's to demo and I like it much better than their older generation of light heads.
The runtimes are superior on canister lights if you have a larger battery. Some of us need this but it all depends on your dive profile. I've got a ~5.5-6 hour tested burntimes on my HIDs with 20ah batteries. This is great for multiday excursions where I can't always charge my light or I'm doing a long bottom time. I also run my heater off these 20Ah batteries and have separate lids with E/O cords.
Having said all that, I did pick up a couple DiveRite LX20+ for travel and shorter duration dives. A good portion of my cave dives are only 2.5-3 hours. It's right on the edge of the LX20+ runtime at max brightness but they are perfectly fine for 2-3 hour cave dives. At medium the runtime is ~3 hours. The nice thing about LX20+ is they take 18650 batteries so if I were doing multiple dives a day I would just keep another set of batteries fully charged.
I bought them primary for warm water travel and for sidemount since none of my canisters have side glands and I didn't really want to deal with a cord for sidemount.
I've also recently been using the LX20+ in Great Lakes so I don't have to have 2 canisters on my waist. My batteries are the older 20ah which are quite bulky. I can use one canister on my belt to run my heated vest and just use a handheld primary since for the most part I only really need my lights for 30-40 minutes on the bottom in the Great Lakes. I turn the light off on deco so I really dont need super long runtimes.
I did actually drop one of my handhelds lights (in came unclipped on deco on a wreck at depth of 250ffw). Luckily we did another dive the next day and I was able to recover my light. It was right next to the mooring but it still annoys me; That would not have happened on a canister light. Normally I'd consider something like that gone for good and I'm not going to go hunting in the mud at 250ft but thankfully it was right next to the mooring.