Really interesting case for discussion here. We're all making our own stuff according to our important tastes... And yet WordPress is out there massively more

Really interesting case for discussion here. We're all making our own stuff according to our important tastes... And yet WordPress is out there massively more successful than just about anything. How? Why? Is it just that they were early? What's the secret to their success? To me, it's that it seems (even if it isn't) like it makes website building simple.