I think that one good thing from these services was the relatively high barrier of entry. Today, online services are all about low friction signup, which makes a lot of sense in the highly competitive Internet of 2023. But when computers were somewhat niche and you really had to figure out how to get things working, users were a lot more committed and thus the quality of discussions was a lot higher.
Interestingly, Hacker News has a fairly low barrier of entry and high quality discussions. Maybe because it's kind of ugly and scares away the average user expecting animated prompts and fancy style sheets.
Speaking of BBSs, there is nothing today that quite captures the full value proposition of BSSs. Back in the day, you could sign up to one of them and meet a lot of locals due to the high long distance phone bills. I made a lot of "real world" friends, even a girlfriend or two, back in the BBS days.
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Do newer LED headlights even have a duty cycle?