Xbox team has some good eggs at least. They didn’t need to make certain x360 titles forwards compatible, you can’t even get the disks new anymore, but they did it anyway.
Certain, as in those that are likely to sell, not all. These days the hardware is basically commodity and the time of innovating on CPU arch and hardware is over (remember the PS3 Cell CPU and the PS2 Emotion Engine?). You're getting commodity PCs in a unique form-factor and walled-garden support.
MS might be making a move to break the garden with GamePass, but only because they want people in GamePass's walled garden so they start renting games from MS instead of buying them from competitors. For over a decade they have failed to compete with Sony and Nintendo on quality first-party gaming.
