What happened to optimus-manager?

The optimus-manager package seems to be gone from the AUR. What happened to it? What is the current recommended way to get hybrid graphics working on discrete/integrated nvidia systems?

I remember it being an absolute ballache when I was figuring it how to get it working a couple of years ago and optimus-manager was the only one that seemed to kind of work. (It never actually allowed me to switch graphics without a restart but it's not something I ever really had to do)