My guess would be Google. When the first banner carousel came and users complained Nvidia told us they used the stock launcher, we should complain to Google, they don't care and we're free to use another launcher (still do ever since and they never tried to block that).
At the beginning the launcher-manager acted a bit weird (started FLauncher on every home button press) but a reboot with power off did solve that. Now the launcher starts with boot and stays. Ever since I've never had issues. I use an external USB DAC to feed my vintage HiFi tho.
You gain a clean interface a Unsplash wallpaper selector and a nice screensaver (galaxy generator rocks) :)