I can’t remember if this was mentioned in yesterday’s CC, or if I read it recently. A typical BLA consists of @ 200,000 pages!
For comparison the Bible is @ 1200 pages.
Lord of the Rings Trilogy also @ 1200.

If the 200k is correct little wonder these things seem to take forever.
BTW NOTHING, ABSOLUTELY NOTHING, takes 200K pages. Somebody is getting paid by the word!