I’ve always thought it was a mistake for Microsoft to drop Windows 10 upgrades for free (although it seems you can still get a free upgrade with a clean install), but I understand them wanting to sunset that deal just to force people to upgrade early. But Spectre gives Microsoft the perfect excuse to bring the deal back. Your Windows 7 machine will get slower, but never fear, now you can upgrade for free to Windows 10! They can legitimately claim that the situation has changed, and so they’re offering this to help out their customers, move more folks to Windows 10, which they want, and get some good PR from trying to mitigate this issue that Intel has handed to them.
I think this would be a great opportunity for them to take.