🚀 go-pugleaf

In GNU Emacs 18.50.3 of Wed Aug 17 1988 on rigel (usg-unix-v):

C-g does not interrupt disk I/O operations (file reads, saves,
autosaves, etc.).  This can be a problem when the files involved are
large and you're writing over a slow network.  It is barely tolerable
over an unloaded Ethernet... what will happen when I start mounting
file systems on the other side of the Atlantic over a 56kbaud line?

(If I recall correctly, Emacs likes to read/write the whole buffer in
one system call.  If system calls aren't interruptable, perhaps this
is a bad idea.)