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
I started using them back in the day, when most phones had a very limited launcher. I have used nova for many years, it has a ton of customization options. I'm not sure how it is these days, but previous phones also came with thing that I did not like and could not disable or remove. Like a permanent Google search bar, or the Google assistant being a dedicated page on your home screen.