  Although Feynman integrals in general cannot be expressed as well-studied
special functions, they can be calculated systematically and efficiently using
the \texttt{AMFlow} method in combination with differential equations in the
kinematic space. Therefore, it is constructive to define Feynman integrals as a
new class of special functions (or transcedental numbers if there is no
kinematic variable). Several crucial avenues for further exploration in this
direction are outlined.
