To use a good point of reference that I've seen others also start using lately, an installation of Windows 95 is roughly 40MB, so in loading that page you've downloaded approximately one Windows 95 installation. Then another 10+ times with the 500MB more that came after.
That's not a fair comparison. A desktop wallpaper could be 8 MB for a modern OS just because of screen resolution. A 4-minute music video would probably be 100 MB.
I don’t think comparisons to native compiled code for old low resolution computers are all that valid for multimedia websites.
I can take a single photo with my iPhone that is larger than a Windows 95 installation depending on my output settings.