Comment 31 for bug 109114

its a matter of priorities. As a technical challenge we'd love to
support versioning multi GB files; we have discussed how (sharding the
files), but its not on the current roadmap for Canonical sponsored
work. If someone stepped up to do it, I'm sure the core team would
happily articulate the constraints that would apply to the system -
but its not a trivial bit of work, and there are lots of interactions
with networking and performance (of more regularly sized files) to
consider.

-Rob