Unfortunately, with the advent of electronic learning management systems and corporate content management systems in universities that are as much as required to be used, this seems to be declining fast. Currently I work as a lecturer at the same university I studied at twenty years ago.
Then, almost every teacher and researcher did have their own website behind "~username" on the open web. For most it was just a list of publications and courses they taught. For these courses they often made an overview page with links to all kinds of interesting material, from lecture notes, old exams, literature, to tools, thoughts, and curiosities. Some went all out and made a personalized personal web page with all kinds of interesting content. I spend a lot of time browsing and reading and exploring these pages when I was a student. Now I wished I had downloaded them all.
Now, no-one but some old-timers do have a "~username" web page. Courses and their materials are hidden away behind the walls of the learning management system we use. Their publications are visible via the library's repository and bibliographical system. For the rest, everything that is on the open web on the university's servers is published via the corporate content management system with rules and regulation what and how to post and most employees do not have access to edit anyway. Many researchers are part of some academic social networks like researchgate, but that's outside the scope of the university's servers.
What is left is for those who are interested to share to setup their own websites elsewhere. Not many do, unfortunately.