Animated Engines first came online in 2000 [0], and has essentially been frozen in time ever since. Now contrast it with this [1] from 2021. It's amazing how much web technology progressed in those two decades.

[0] https://web.archive.org/web/20090216150235/http://animateden...

[1] https://ciechanow.ski/internal-combustion-engine/

[1] impresses me every time I see the link come up. I wish they'd do a Wankel.