Comment by defrost
6 hours ago
It's an interesting point of view, conversely, as an Australian of some decades, they all look fairly normal to me and a subset of a greater spectrum I'm also familiar with.
Right angle plugs may well be less common (in your experience) but they're essential for, say, getting power from the wall to a breakout strip (for TV + games consoles, NAS, media box, etc. corners) when the wall plug is behind a low cabinet / cupboard.
In any case it's a museum, a catalog, intended to show a range of things that do exist, even if a good number may not encounter them frequently.
Yeah I'm not saying they are unheard of - for example I've done a lot of stuff in AV and almost every single extension cord you use in that world will be a piggy-back right angle (always moulded though because they have to be test-and-tagged so a reputable certifier won't pass them).
Just that not having any pictures of the plug that you see on 90% of cords in normal use is an odd choice.