This is the context I meant my statement to be taken:
Personally, I think Henry wants to reset after this year, especially since we won in 2018, and some of the pressure is off. If this is true, it's a major budget constraint that pretty much means we lose every FA-to-be and can't replace anybody through cheap free agents.
If we set the limit at the $19.9M over mark, we will have the ability to keep JD or sign someone (cheaper) to replace Porcello and/or JD.
If we set the line at $39.9M over the mark, we can stay about as competitive as we are now, but may have to lose Porcello and replace him from within or with a cheaper FA.
If we are okay going over $40M, we can keep everybody and maybe add a moderate FA somewhere (pen, 1B, 2B?).
To me, the budget Henry sets or strongly suggests will be the major factor in what happens next year and what ends up happening with Betts after 2020.
If we reset after this year, we may be able to afford to pay Betts (and the tax) afterwards.