[lmm]

I don't think we're not talking a couple of years, more like weeks or days.

How many actually new concepts are there? "sealed" (very simple, but ok it doesn't exist in other languages), "+A" for covariance (genuinely new, but you can ignore it until you want to use it). "with" for multiple inheritance I guess is new, but it works the same as "extends" inheritance (you might have questions about how it handles diamonds, but there aren't any here). Values and members should be familiar, as should the concept of shadowing if not the name (but there's not really a standard term for it).

Implicits are genuinely new, and genuinely complicate the code; I think of them the same way I think of lisp macros (they're too powerful, they're too easy to make the code incomprehensible with - but they enable things that we can't live without, and that we haven't found a safe way of allowing yet). But even then, the concept is very simple and easy to understand.

A big block of text with lots of unfamiliar words in is intimidating, but I don't think it's truly confusing or unreadable if you just take your time and actually try and read it.