Re: [PATCH 2/8] pack-objects: produce a stable pack when --skip is given

You noticed that tying the behavior only happens when the user asks
for it, right? I don't expect people to do resumable fetch/clone by
default. There are tradeoffs to make and they decide it, we offer
options. So, it does not really tie our hands in the normal case.

You misread me. I do not want to see us having to add
"disable_this_feature = 1" next to that "delta_search_thread = 1"
in this block, and then supporting code to actually disable that
feature, only to support this block. You are declaring that "to
support this mode, we must always have a way to produce a
byte-for-byte identical output and keep supporting it forever".