Final editorial review of "Allow deprecation of input values #525"

[leebyron]

Merged but not move to approval phase. Needs final editorial review.

#525

[leebyron]

I misunderstood what was happening in #525 - That was merged into a feature branch, not main. The work continues in #805. I've applied some review there, but this issue is no longer considered blocking for May2021 cut