Given the effort required to put cabling in e.g. mine is underneath plaster, future proofing it as best you can could save aggravation in the kind of timeframe that people live in houses for.
The #MeToo movement covers a lot of people. Any mass movement will include some more extreme than others. I don't believe your characterisaton of the movemnt is a fair description of the average person who is part of it.
Is point 5 true for the newest tunnels like the Jubilee Line Extension? I think the DLR has an emergency walkway in the tunnels to Bank. I am expecting Crossrail will too.
Understanding that we all have different mental models, and that affects how we learn. Understanding my own vs my students' helped me to get them to understand what I was trying to communicate.
I would be very surprised to see them take that reimplementation path as their backwards compatibility has been so important for decades (yes I know not everything runs still; but a large amount does). They have provided an evolutionary path and that would be revolution. The benefit to them seems likely to be outweighed by the disruption. And they know points of disruption are where they are more likely to lose customers.
The Docker images are smaller for Linux for one. Our team use the Linux version in tests during builds just for that. We are relying that Microsoft manage to keep the two versions close enough that it's meaningful.