Question about default tracks


I’m using tracks for one of my snap-packages, and I was thinking to use the newest track (major versioning) as the default channel, and that those who want’s to be on a rolling release have to switch to latest channel.

However, what happens if someone installs the snap with sudo snap install <snap name> and the default track is e.g v12.Will they stay on the v12 channel until they manually choose to switch, even though there’s a new default channel for it (e.g) v13 set for the package? Or will they automatically be pushed over to the the new channel, when I choose it as the default channel for the snap?