This is nice because it focuses mainly on deep evolutionary history, talking about how, contrary to common opinion, spiders are not particularly closely related to insects.
They’re all crunchies together, rather than squishies. Isn’t that enough to combine them in an evolutionary taxonomy?
(Nope.)
Remembering all those times Spider-Man complained about villains calling him an insect. Do remember one cartoon when he issued a similar complaint about being called a “bug,” which I always thought included anything with an exoskeleton aside from aquatic crustaceans. (Yes, I continue to insist rolly-pollies are bugs, even if they are terrestrial crustaceans. Also Crow T. Robot was right that soup is a quadruped in Earth Versus Soup. It’s stew that’d clearly be a biped if hit with Hollywood radiation. /silliness)