No, I also do not want the Sonos concept, which in a way creates a lock similar to Microsoft Homegroup variant, in their respective range of use.
I agree with your remark that life is a compromise, but I will suggest you are a bit to general in your questioning. Things and needs are a function of context. For example, I would like to increase granularity on the question of complete openness everywhere. Will I have complete openess?
In the private homework consisting of my family computers and devices of all sorts? YES. Please let me have it. It is not so much to ask. And the protection should not be in the interaction in the private (wiFi) network, but on each personal computer. That’s sufficient and the router has a firewall to protect from strangers. Windows10 should guess this need for communication in the family and that such needs will tend to be default, but Windows10 rather obscure setup and maintance can be quite a timethief if you are unlucky. After all, the subtitle of my Windows 10 is “Home edition”!
There is also an obvious lack of software maturity, because my problem was that Win10 indeed found the other units, however when clicking one of them, they could no longer be detected. This is of course a bug that has slipped through the fingers of the production manager at Microsoft. It looks not so smart. (dosen of similar examples).
But regarding complete openess in the public domain, the answer is NO with remarks, just don’t exaggarate the security paranoja. I insist on right to have a “Set this whole device in audiophile mode” even if it is online connected to Roon and its subvendors. There are many working with precisely such a feature, but they are outside Microsoft, trying to tweak down the system activity.
Actually, I just did that with a vintage Macbook Air 2009, now working silently and calmly in the role as roon server: http://www.noach.one/blog/how-to-reborn-a-macbook-air-2009-apple-vintage/ . And so fast, too. Reborn.
So this job that Microsoft needs to do is not one single issue, but a myriad of weaknesses that can easily be improved in this, or in that context.