It slightly degrades some experiences, so I see why it's disabled by default. Disabling JIT JavaScript is going to make web browsing more painful. And incoming friend requests are useful because it simplifies things when two people are adding each other to their phones - one sends a request and the other reciprocates.
> It slightly degrades some experiences, so I see why it's disabled by default.
My sense is that the functionality to provide those experiences resulted in a decrease in user security and privacy when they were introduced -- and that those risks were widely-discussed and well-understood.
It's weird (although not unexpected) to see the reversal of them touted as a selling point.
