This is how in brings better typography:

Randomize (rand) makes your text looks like handwritten by randomly rendering different forms of the same letter. This is easy to observe in words that have consecutive repeated letters, like “Raccoon” or “Bookkeeper”.

However, true support for Randomize in today client applications is somewhat limited, so many fonts (including Caveat in this demo) implement them via Contextual Alternates instead.

A font that have this feature is Caveat. Try them with text like Red Racoon and Bookkeeper.