Congrats, your plants are propagating! That's the natural genetics of most succulents.

When the get big enough you can either behead them, or some will even grow roots and naturally pop themselves off the stem.

Bernard

Thanks Bernard. How big is "big enough?" I'm getting ready to buy some gritty mix online to eventually transplant them in to before winter. If I pluck off the rest of the leaves will it kill the plant or make the rosettes grow faster?

This plant was propagated from a single leaf a few months ago, now it's offsetting another mini rosette in the bottom. Ideally how "big enough" you want it to grow before transplanting is at your discretion.

Do not pluck anything and its best to let the plant do its thing. They fair much better with some neglect, but just make sure you water the roots enough to prevent it from drying up.

I favor using a water dropper to hydrate the roots every other day over a mist spray, so the leaves remain dry from fungus/rot.

The mother leaf of this plant actually fell off from the plant by itself when the wind blew, because it was so dried up, and that's a good sign because the plant had already maximized the nutrients from the leaf.

Some rosette succulents will actually form shrubs or subshrubs if you leave the lateral growths on the plant. It really depends on your preference on whether or not to remove them.