I think the summary is that e-diff is in effect a locking diff, even if it's not technically a locking diff. If you call it a limited-slip, which it really is, then that creates entirely the wrong impression of its capabilities.
With a true locking diff if you wanted to turn the axles at different speeds you'd need to literally break the diff to do so. Clearly with the e-diff you'd just rotate clutch plates...but 30k Nm it may as well be locked solid for all practical purposes!

