Roy,
I think a lot depends on how confident you are that we will reach that
tipping point in a timely manner (if ever).
[snip]
*I* am not confident about any of this.
If (like me) you are unsure, then I guess you could start by weighing
up the costs of getting it wrong in both directions.
Yes, that would be a good start.
It seems to me
that the opportunity cost of failing to achieve critical mass far
outweighs the cost of a little added complexity in the specification.
You may well be right. But this is, of course, an early adopter (of SPF)
position. Now convince everyone else.
Regards,
JK