I agree with you @Codetapper. Film first. Tat later.
They say this is the only edit, so it is very annoying to know that a lot of footage will be left on the cutting room floor (or is that hard drive!
The only thing I can think (I hope) of is studio mastering time is very expensive so they need to get a fair bit of additional funds to have the additional time.
I guess we can only hope some wealth AMIGA lover fancies bumping it up, as it would be great to have the 'AMIGA doc to end all AMIGA docs'. I can see it getting to 2hr but going to be tricky hitting anymore.