It's not SEO, it's just age. I am an old man with an old school website that's happened to have been up for a long time.
Disagree. My first personal web page from 1996 is still online and I have a very rare (perhaps unique) name. Until a few years ago, all my personal pages (including FB, Twitter) were ranked high by search engines, but since then they've been dethroned by references to former companies, press coverage, websites that list people affiliated with corporations and other such things.
My conclusion from this is that personal pages have somehow been ranked lower recently and news sites and popular websites will be ranked higher if they mention your name (even if the mention is not prominent and years old). This means that nowadays it would probably be useful to put a personal homepage on a popular site like about.me.
These days with "personalised" search results it is harder to tell, but my own searches for my full-name bring me first. Even though I share that name with a few other people.
(I wish I'd bought steve.com, there was a time when I was tempted but after a year or two it was too late. I ended up having https://steve.org.uk, then later https://steve.fi after I moved to Finland.)