Gopher is still kinda active, usenet has a few holdouts, email is as alive as ever, gemini is niche but there, IRC refuses to die, atproto is just getting off the ground, activitypub is a thing in some circles, matrix is around in some circles, xmpp is the only non-shit messaging standard, and I'd argue the "platforms" of today (facebook, twitter, instagram, tiktok, youtube, etc.) aren't really the web despite being web based