prestoooooo

cement is the binder, usually made of lime, which is mined from limestone.

concrete is cement plus other materials such as gravel.

stones are naturally forming solids made from minerals.

this should help get you started. wikipedia is your friend.

Pros

* Breaking changes can be done at once. Very helpful for runtime deps.

* No chance that a repo is out of date.

* Upgrades are atomic (may be hard to test a system in a half state).