[math-dev]

The internet is alive and well if you know where to look. IRC, subreddits, some twitter circles, github, hacker news, etc. Once you delve more into what you are into, you will find people and the places to interact. IRC in particular for me has been a great blast to the past

[NuNotNon]

You forget to mention Quora.

[Pention]

Are we alive though?

[ThrowawayR2]

I can be remarkably life-like at times.

[math-dev]

Hard to say

[kongin]

What's a good IRC channel for cs/maths/physics?

After the freedone implosion I don't know where anything is any more.

[math-dev]

#maths or #math at irc.libera.chat is pretty active.

For CS / Physics, perhaps try asking there too, I usually hang out in #emacs and #vim. #emacs is super active, so if you ask there, you will get good pointers

[eigengrau5150]

I'm undead. :)