It’s part of the front assembly, see Step 6.

No it isn’t. Those are two separate components, just like on iPhone.

The IR flood illuminator sits right between the FaceTime- and IR-camera and is probably part of the front assembly, while the IR dot projector is way off to the right of the FaceTime camera as seen above.

That’s probably rather to be credited to John Ternus and the Mac hardware engineering team, although they for sure work closely with Ive’s industrial design team.

Don’t think so, A9 had DDR4 as well.

Shouldn’t the T2 be what was rumored as A10 (iBridge)?

All you complainers seem not to have heard that there’s a new Mac Pro coming out some time in the future, explicitly announced by Apple to be modular and upgradeable?

This is no different than with a single-board SSD, not more points of failure than that. This isn’t hard drives where each HDD adds a spinning disk and doubles the risk of failure.

The T2 might have some similarities to the A10, just as the T1 had to the Apple Watch SiPs. Perhaps that’s where the rumors came from.

Shouldn’t be much of a surprise that there’s no need for Raid 0 since standard iMac and MacBook Pro have similar Flash speeds also with a single SSD.

Looks a lot like that a "speaker port" for the Taptic Engine, for the home button to not only feel but also sound clicky.

What you described as a sound chamber doesn't seem to actually have any connection to the microphone, but to the Taptic Engine.