People really need to stop being hyperbolic about this. Things are simple in the Business world: If you don't get enough customers that pay with Bitcoin, you drop it eventually. Why would they bother if they can't generate many sales?
Why exactly bitcoin could be a threat to Microsoft?
It isn't.
The step towards blockchain instead Bitcoin makes sense for M$.
If profit is the main agenda, possibly.
Where did you get this settlement thing? From Blockstream and core propaganda?
That's exactly where he got it from since he is in support of a controversial HF.