Is there an affordable way to learn the details of IEC 60950?
Okay, answering my own question after some more research.

The short and correct answer to the question posed is probably simply "No".

I've obtained the actual standard now. It is very well written, and very informative.

While bits and pieces of it can be found in various recommendations around the net, it is a 300+ page document, and it simply isn't likely that anyone anywhere will have made a useful and reasonably complete summary of it.

The cheapest option to obtain it legally is probably to buy an old used printed copy.