IBM / Red Hat decided to discontinue development of power-profiles-daemon and therefore fd.o marks the repository as "archived". Presumably Fedora will stop shipping it before long and replace it with TuneD.
TuneD generally has a customizable set of power profiles that can be much more extensive than the three hardcoded profiles that power-profile-daemon offers/offered. In the case of RHEL, this means a set of 15 or so profiles, most of which are optimized for particular server loads. There is the standard powersave profile but also three different kinds of "performance" profiles, as well as a desktop profile to improve on balanced which is still a thing here. I'm not sure if we can even rely on any particular profiles being the same across distros. In a nutshell, things could get less one-dimensional compared to the simple three-stop slider that we're currently using.
Of course, there are still other power profile solutions out there, like good ol' TLP and custom profile modding à la #26. Nothing says that TuneD necessarily has any claim to power profile supremacy, other than Red Hat's pretty good track record at popularizing system infrastructure. I don't even have the faintest idea of what FreeBSD people are looking at (perhaps a question for @adridg).
Either way, it looks like we'll need a plan for expanding power profile support beyond just power-profiles-daemon.
(CC @nclarius in particular, given that you put a lot of work into the Battery & Brightness applet that uses the three-way slider.)