Our sim training scenarios usually change every 6 months; changing profiles, changing airports and changing systems failures. This way we get exposure to a variety of challenges that could not all be realistically compacted into a single 4 hours session.
As to the original question on this thread; If "most things" are being covered during a TR or a single 6 months' recurrent check: Only the most important things, but not all things.
The presumption is that you already know how to fly, and the objective of a Type Rating or a 6 months' recurrent sim check is NOT to teach you to fly, but to ascertain if your demonstrated performance meets acceptable standards.
