this post was submitted on 15 Jan 2026
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[–] tal@lemmy.today 3 points 6 days ago* (last edited 6 days ago)

I will say that, realistically, in terms purely of physical distance, a lot of the world's population is in a city and probably isn't too far from a datacenter.

https://calculatorshub.net/computing/fiber-latency-calculator/

It's about five microseconds of latency per kilometer down fiber optics. Ten microseconds for a round-trip.

I think a larger issue might be bandwidth for some applications. Like, if you want to unicast uncompressed video to every computer user, say, you're going to need an ungodly amount of bandwidth.

DisplayPort looks like it's currently up to 80Gb/sec. Okay, not everyone is currently saturating that, but if you want comparable capability, that's what you're going to have to be moving from a datacenter to every user. For video alone. And that's assuming that they don't have multiple monitors or something.

I can believe that it is cheaper to have many computers in a datacenter. I am not sold that any gains will more than offset the cost of the staggering fiber rollout that this would require.

EDIT: There are situations where it is completely reasonable to use (relatively) thin clients. That's, well, what a lot of the Web is


browser thin clients accessing software running on remote computers. I'm typing this comment into Eternity before it gets sent to a Lemmy instance on a server in Oregon, much further away than the closest datacenter to me. That works fine.

But "do a lot of stuff in a browser" isn't the same thing as "eliminate the PC entirely".