The community college system does a good deal here. As an example in California, students can get a great deal of their undergrad lower division work done at a community college for a fraction of even UC or State university cost (which for instate students is already fairly low).

Community colleges are also where folks would normally turn to for casual the classes they wanted to take but didn’t necessarily want the formalities of the full degree. Online delivery of there helped further but vs MOOCs, CC has geographic and residency restrictions for who can actually study there.