After Working on it alone for a year, the founder and original developer of Nova Launcher Kevin Barry has stopped working on Nova Launcher and the open sourcing efforts. More Info: https://teslacoilapps.com/nova/solong.html
My phone still work's perfectly fine, so I plan to keep using it for as long as I can & it won't be getting any android os updates any time soon, so I think I'll be fine. When my phone eventually does give up the ghost, I’ll deal with it then, but until that point, nova should keep working just fine for me....