Workflow
There are probably children out there holding down spacebar to stay warm in the winter! YOUR UPDATE MURDERS CHILDREN.
There are probably children out there holding down spacebar to stay warm in the winter! YOUR UPDATE MURDERS CHILDREN.
Users will often try to work around bugs in software, and are sometimes able to get used to having the bugs around. Some bugs are even interpreted as features and users complain when the software authors fix them. This phenomenon has been named Hyrum's law: the law states that whatever the official feature list actually says, if a program has enough users, eventually every behavior of the program (whether intentional, unintentional, or a bug) will be relied upon by someone. A similar effect may be caused by other changes, particularly those which involve alterations of the user interface.
This comic shows a somewhat extreme example. An unnamed application had a bug causing the CPU to overheat whenever the spacebar was held down too long. In version 10.17, this bug was fixed. Soon, LongtimeUser4 complained that they relied on the fact that the CPU overheats if the spacebar is held down. They had stumbled across this "feature" (which is, again, weirder than usual) and took advantage of it to streamline their workflow, and they wanted an option to re-enable it.
Emacs (name originally derived from Editor MACroS) is a text editor originally written at MIT in 1976 and adopted into the GNU project in 1984. The control key sees extensive use in Emacs, and since it's hard to reach, users often remap it to Caps Lock or some other key. LongtimeUser4 fixed the problem very clumsily ("horrifying," as the admin puts it) and is annoyed that their kludge no longer works. The moral of the story is that you can't please everyone.
Examples of real life changes in software which, though often acclaimed by critics, caused great annoyance among the existing user base include ribbons introduced in Microsoft Office 2007 and the Start screens of both Windows 8 and Unity desktop manager bundled with Ubuntu from versions 11.10 through 17.04. In the latter case, developers included an option to use the older interface; for the rest, applications emulating old behavior were developed by third parties.
The title text makes a hyperbole to humorous effect; children will freeze to death during the winter because they won't be warmed by a rather unconventional heater. Making (or creating an illusion of) a connection between one's opinion and care for children's welfare is a common method of gaining public support, as such arguments are hard to deflect without sounding cruel and uncaring. "holding down spacebar to stay warm" could also be a reference to space heaters.