I think it’s just like Steve Jobs said: they have no taste. That never changed and it causes them to fail time and again with innovations
Microsoft was early to making tablets, smartphones, living room PCs, etc. They just royally screw up the execution of each product category every time.
Maybe it'd be a fun idea for to take some of Microsoft's failed consumer ideas, and revisit them 10-15 years later to see if some other company successfully executes on it.
Most of the time MS is actually delivering something successful is when they are very late or bought it and put their sticker on it.