Oh wow, I just discovered that my brain unconsciously had a hard time to differentiate between SSL and TLS. And now, after two friggin decades I find out, why!
I learned about that around 2010, but before that was also clueless about it. What triggered me was that in Java you still use a SSLSocket to start encrypted connections even when using TLSv1.3 today!
Same. I feel so dumb now. After 15 years in this industry i finally figured out that ssl and tls are the same.