...using the MockJobTicket setup as point of reference,
since the actual invocation of render nodes will only be drafted
later in this "Vertical Slice" integration effort...
basically we can pick just any convention here, and so we should pick the convention in a way
that makes most sense informally, for a *human reader*. But what we previously did, was to pick
the condition such as to make it simple in some situations for the programmer....
With the predictable result: even with the disappointingly small number of usages we have up to now,
we got that condition backwards several times.
OK, so from now on!!!
Time::NEVER == Time::MAX, because "never" is as far as possible into the future
