"should I really take the time to learn fexprs?"

You should take the time to learn fexprs if you answer yes to any of these questions:

• You like Lisp, and want to learn even more about its rhyming scheme. Subjectively, a Lisp with fexprs feels even more Lisp than Lisp.
• You are dissatisfied with either the need for GENSYM, or for a hygienic macro system's complexity. Fexprs require neither.
• You think that everything in a PL should be first-class.
• You'd like to see how a single concept can replace both functions and hygienic macros.
• You want to implement a PL with as little code as possible (since fexprs give you the power of both functions and macros, you don't need to implement a macro system to bootstrap your PL.)
• You like to get your mind blown.
• You like hygienic macros, and want to understand better how they work. Even if you don't use fexprs, understanding them can show you how hygienic macros are really a special case formulation of fexprs.
• You think that PLs should be designed not by piling feature on top of feature, but by removing the weaknesses and restrictions that make additional features appear necessary.