@Lift Blog confirmed that Disney will use CWA OMEGA IV-10 SI D cabins. In fact,
the main thread has a couple of pictures of the cabin.
1. This post has a picture of a test cabin hanging at the DHS station:
https://forums.wdwmagic.com/threads/new-gondola-transportation-disney-skyliner.924477/post-8376838
2. And we have the posts referencing pictures of the gondola cabins that were spotted on a truck:
https://forums.wdwmagic.com/threads/new-gondola-transportation-disney-skyliner.924477/post-8260581
3. As well as the wdwmagic article on this spotting:
https://www.wdwmagic.com/transporta...otos---disney-skyliner-cabins-now-on-site.htm
Edited to add: Just to be clear
@MisterPenguin isn't the source of all definitive speculation in that thread. I'm not sure how you got that idea or what you're really saying about him. He is undeniably the best at measuring distances and draws the best scale diagrams of projected new attractions and other structures using Google Earth, though.
Gondola systems where cabins detach from the line at the station have relatively speaking much fewer issues with having to stop the line. Also, it's not like a chair lift where people regularly fall getting on or off the chair. In addition, We've gathered from the thread and pictures of the station that there are extra-long boarding and disembarkation areas for the Skyliner installation, as well as what is guessed to be a second boarding area for ECV boarding. There's dozens of pages of discussion of this on the main thread, and the wonderful thing is that for any question you might have, you just have to keep reading and all are answered.
Another strength that the system has is that it can be highly reliable and have multiple failovers and backups to keep it in operation.
That's a truism.
This is discussed at length 14 separate times in the original thread. The gist of the speculation on how Disney will handle it is that they will stop operation of the system when there is an active lighting storm anticipated, much like many of the outdoor attractions are stopped. It's still an open question whether the stoppages would be lengthy enough to merit Disney dispatching backup buses to take up the slack.
Like you said, nothing is 100% certain until the system is in operation or unless we get a leak of the operations manual for the system.

But if you're one to really be interested in the corner cases of such a system as I am, I can heartily recommend spending the days to read the main thread in full. It is truly rewarding. One "feature" is that you never have to reread anything because the same questions come up again and again, so if you didn't understand something fully reading it the first time, don't worry, you'll have at least a dozen opportunities to understand it when the issue is addressed the next time it comes up.