All three authors are large contributors to the field (the book _discrete and computational geometry_ by O'Rourke & Devadoss is excellent), Demaine has some origami in the collection at MoMA NYC^, Mitchell found a ptas for euclidian tsp (Google it - the paper is readable and there is another good write up of his vs Arora's)

^ https://erikdemaine.org/curved/MoMA/

Mathematicians led by Terence Tao are keen to explore new ways for mathematicians to collaborate remotely and online to tackle all open problems together in an open and technology-supported way. I think problem inventories should be part of that, together with proof collections, existing datasets such as the great On-Line Encyclopedia of Integer Sequences (OEIS, at https://oeis.org), and perhaps Jupyter-type notebooks that utilize symbolic algebra systems, theorem provers etc.