Oh God, not this story again.
I'll tell you what I told my uncle complaining his 200Mhz Pentium MMX with 64MB of ram, running Windows 2000 was slow when going on Facebook.
Yes, we do (pretty much) the same things we used to do ten years ago (this is a lie, actually). What has changed is the volume of data that we generate, send, receive and have to store and process.
The first digital camera I got for Christmas maybe 14 years ago took some nice photos. At high resolution, a photo would take 80 to 100 kb of storage. No metadata. And you could have up to 20 photo in high resolution. It was a kind of a "toy" camera, but still.. Nowadays kids with digital cameras can take photos that take 7-9 megabytes per photo.
Your mail client does not send your username and password as cleartext anymore. Everything is encrypted.
Your www browser does not send your forms (and your passwords too) as cleartext anymore. Everything is encrypted.
Ten years there were no videos on facebook, no realtime chat, no realtime video streaming. There was no Dropbox, and most webmails used to allow up to 100MB of storage.
Data grows, and this is why the industry puts out faster computers every year. And this is why computers become "old" and "slow".
Get over it.
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Now, we could ask ourselves, why do many websites have to be so fat? I would really love to see websites supporting an "ultralight" version.
Just like HN: the source is all tables, td and tr but... It renders well on mobile and works awesomely fast on a ten years old laptop (and I tried).