Re: How do you isolate a timeline? *minor DTI spoilers*
No, I intentionally said "isolate" rather than "collapse" to imply that the timeline was somehow sequestered so that it could continue without affecting the main timeline sheaf it was branched off from.
Like the Abramsverse?
"A hot dog at the ballpark is better than a steak at the Ritz." - Humphrey Bogart