Not base64, but similar.
I think "IJASDO" would be way easier to memorize than person.guards.gangs (I will definitely give W3W credit for picking unintentioned yet humorous word combos), particularly if English wasn't my first language.
If you disagree with this logic, explain to me why automobiles' license plates should use W3W-style. ("idiot-driver-honk").
Wait, was that first one persons.guards.gangs? persons.guard.gangs? You'd think if you were one off in the dictionary it would still get you where you needed to go, but no.
W3W is a clever product. Mine is also clever, and this industry will never have one-size-fits-all, and that's ok.
W3W has a not-so-clever marketing approach. I doubt plus.codes would have ever seen the light of day if W3W had a more FAANG-style approach to marketing.