I was just having a browse of an Irish supermarket's laundry products section, and u would reckon that about 10% or less of the shelf space was given over to powder based tablets seem to be completely gone, other than a few store brands.
The dominant format is pods. Ariel Pods are more or less identical to Tide pods, but maybe have different formulation because of scent preferences. P&G Bold, which is basically the same product but focused on scents is in exactly the same formats and even budget brand Daz has entirely gone over to pods.
On the Unilever side, Persil is also using a multichamber pod for both their bio and non bio ranges while Surf, more focused on scents and value (although it's moving away from that) is just a simple single chamber pod.
The store brands also all do pods of various designs.
I think people are becoming accustomed to the quirks of pods too - making sure to place them at the back and bottom of the drum, or inside a sock or whatever to ensure they don't end up on the door seal. I'm surprised that no European washing machine maker has yet launched a pod friendly dispensing system. I think Electrolux did in the US, so it's not like they couldn't just roll it out here in Electrolux, AEG and Zanussi brands. The focus seems to be all on auto dosing liquids amongst the manufacturers.
Other than that there's a reasonable number of liquids on sale - they're probably been driven up by the advent of more auto dosing machines, which have reservoirs. They're moving back to runny liquids and away from the gloopier almost gel like formats that were around for a while.
The are still some gels, notably Ariel, but I don't think they really ever took off as they're just too messy and involve those damn noisy caps that bounce around the drum. They've the consistency of a blue gel toothpaste.
Persil (Unilever) had (has) a weird version called Power Gems. They're like little chips, that remind me a bit of a high tech reincarnation of Lux flakes. They're like confetti in a plastic bottle. These are supposed to be dispensed directly into the drum, using the measuring cap as a dosing device. I tried them and they didn't dissolve very well and were generally an absolute disaster - they were stuck all around the door seal of my Miele, even after a deep, water plus rinse cycle!!
In smaller stores powder isn't always stocked anymore at all, so I'm assuming it's a dying format.
All of the specialist detergents - wools, silks, even some in store brands marketed at jeans etc are liquids.
There were a few eco detergents all of which are liquids: Ecover (three versions), Ariel Pure Clean, Method and Winni's, an Italian eco brand that's stocked by Dunnes (major Irish supermarket chain).
Other than that there's the usual vast array of fabric softeners from non scented, to eco, to every agent you can possibly think of. Also I noticed that dryer sheets, which used to be fairly popular here, particularly Bounce, seem to have all but vanished, and I would suspect that may be because of the change away from vented tumble dryers towards heat pumps and so on. In general dryer sheets are a disaster in any condensing dryer but are even worse in gear pumps as they can coat the evaporator with wax, so I'm guessing that that's why they've fallen out of favour.
Anyway, I guess the days of powder detergents are coming to a close here too. It's a shame in some ways as the packaging was a lot more ecological sound, simple cardboard boxes, than the bottles of liquids and ziplok bags and plastic boxes used for pods. The main argument made in favour of pods is they're super concentrated, this you've far less bulk and weight to distribute.
I guess powder laundry detergents are just going to go the way of powder floor cleaners. It's decades since those have been around!
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