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Unsheilded phase pins no fuse!!!

So true! I've seen many of them. Italy adaptors seem to be better though. I've seen a lot of them in long-term use, and they seem to do well. Only weird thing: they have 16A pins, but are labeled: max. 1500W.

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as no modern plugs will be manufactured to exclusively fit either system.

Only true for molded plugs. Rewireable 7/7 plugs are still really rare.
New receptacles that haven't been used much have a _really_ tight grip on the plug. I sometimes have to use brute force to get plugs out of certain receptacles. OTOH they'll never fall out accidentally.

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I get the impression that the old GOST standard is just a copy of the old 10amp schuko plugs which were rated 10amps.

You mean the old Russian plugs? I've never seen 10A Schuko plugs anywhere else.