I was surprised that Ubuntu, even with a fresh install has the snap installer built-in.. As far as I can see there are not snaps installed with it. I discovered that's not the case, see the reply to this post.
While I'm okay with these kinds of package formats generally (e.g. snaps, flatpaks and AppImages), I recently found out that snap is proprietary to Ubuntu (i.e. no one else can use it). So I removed snap from my system. Here's how to do it in Ubuntu-based distros. (https://www.kevin-custer.com/blog/disabling-snaps-in-ubuntu-20-04/)
There seems to be one issue with this tip that I just discovered but may not matter to experienced users. The Software Center disappears. I guess it was a snap. Since Ubuntu doesn't come with Synaptic by default, you'll need to either download it or the software center using the Command-Line Interface (CLI) or terminal. The commands are:
For both (updates the list of packages from the repo)
sudo apt update
For Software Center:
sudo apt install gnome-software
For synaptic:
sudo apt install synaptic
I'm not sure if any other software was installed in Ubuntu as a snap.