Other courses have a long or indefinite life because the information never changes. Something like Ancient Greek History hasn’t changed in the past very many years.

Many business and nursing/health courses have a life of about 5 years but many computer/technology courses are very short lived. The liberal arts tend to be the longest lived courses.

Some colleges have a flat rule that they will only take transfer credit of a certain age or less. It varies from school-to-school.

Even college credits do not lose value in many programs. You should look for a program that puts no time limit on credits earned. This is true for many undergrad traditional and online programs (though not for graduate programs), so look for a school where this is the case.

Your AA, BA, MA or PhD is a complete degree and doesn’t lose its value- ever.