Well, "Side Entry" Australian plugs exist and are used quite often.Well our plug/socket arrangement is a right angle flex cord which I believe helps avoid pull out largely, probably leads to increased risk of socket contact area weakening slightly.
(https://www.bunnings.com.au/hpm-10a-top-side-entry-plug-white_p4330079 )
These also avoid "pull-out".
Australian Plugs termed as "Side Entry" actually have the Cable Entry point at the "4:30" (clock) position (67.5 °)
(See https://commons.wikimedia.org/wiki/File:Socket-Outlet_with_Side_Entry_Plugs.jpg )
This gives an advantage over other "Side Entry" plugs (such as BS 1363 or the Chinese "I" type), where the Cable Entry point is "downwards"
(180 ° or the "6 O'clock" position.)
Because of the diagonal "side" angle of "Cable Entry", Australian Socket-Outlets may be placed closer to a "Bench", corner or other surface below or to the side, without the cable being much impeded by such a surface.
https://www.hiddenwires.co.uk/news/...-universal-fully-recessed-power-and-av-outlet
gets over that UK problem by orientating the Socket-Outlet 22.5 ° to the Left, in a way similar to the way in which Australian Side-Entry" plugs are organized.