I've developed for WordPress for a long time, nearly as long as I have been a web developer. As a CMS, it has grown into something a lot more powerful beyond it's blogging roots. Between Gutenberg, the Rest API, and plugins like Advanced Custom Fields, there's a lot of flexibility for a developer to work with.
That being said, WordPress also feels like overkill for a small site like this. My portfolio site doesn't really need a lot: a few pages and a set of chronologically ordered posts.
I think like a lot of web developers with personal sites, there is a desire to use your site to tinker with different design and development approaches that your employer may not be using. It's part curiosity and part self-education. This has led me to check out what's going on in the JAMstack world.
After a several periods of working on and off on building the Eleventy version of this site, I've moved everything over without changing anything visual on the site. It is now hosted on Netlify and managed through the Netlify CMS.