I think it's easy to forget we're not the same people we were 20-25 years ago. I see all sorts of lamentations about various things in the world changing and becoming less magical. But as far as I'm aware, I could still go and argue about bands in chatrooms. I could talk to other writers and dream about my future best-selling novels. I could go read random opinions about any subject and get into an exhilarating flame…
This is especially important for introverts like me, that if they have to put their real name on something, for example a comment on Facebook, they think about it 100 times, while being anonymous they are more inclined to share things with strangers. You don't have to worry about what people thinks about you, or about prejudice that people have based on your age, your social life, your job, because nobody knows who you really are. The only thing that matters is your contribute to the discussion. I still remember discussions that I made with people that I only recognize by a username, and they were so interesting, much more interesting than everything you can find on Facebook.
In the old days you were told to never share your real name on the internet, to always pick up usernames, nowadays companies forces you to register with your real identity, Facebook can even ask you to provide a photo of your ID, and YouTube won't let you watch content for over 18 if you don't identity yourself. There are even countries that would like to force internet companies to ask for the identity of the people!
In the old days internet was a place where an introvert that didn't know how to relate with other people in real life could have escaped to share it's interests with other people freely and without any anxiety. Nowadays it's no longer like this, unfortunately. Forums are desert, nobody still uses IRC, and everything is a Facebook group or something like that on a social media platform where I don't want to sign up. Even websites in the old days had comment sections, nowadays you want to comment? Do it on Facebook. There are only a few exception of course (one of this is this website, that I like a lot for exactly this reason).
The only website that still maintains the old web philosophy, and the only social media that I use, is Reddit, that still doesn't require you to register with your real identity. But I fear that it will not last for long...
Also in the old internet there was a spirit of collaboration and community that I never saw in the modern web. You were a newbie in something, for example using Linux? Sign up to a forum, or ask on IRC, and people would have helped you, helped solving the problem, for free, only for the gratification on doing so. And most of the time even the person helping you to solve the problem learned something new in the process! It was fun for everyone. Nowadays even on the few forum that remained, go and ask a newbie question, and they will tell you "just search on Google", make fun of your ignorance, or something like that.