Because of this rant I had a look at the company behind w3shools. This is their about page:
https://w3schools.sinsixx.com/about/about_refsnes.asp.htm
If you want to communicate "stuck in the 90s", take this as your example! The photo of the "Web Masters", the favicon, the W3C-badges, the gif-badge webhosting ad, fixed-width, the CMS400 ad, the bordered boxes around everything. I had a blast.