The answer to "Are there limits or costs to Wishing forever for ability score increases?" seems to indicate "There is a 33% chance you can never cast wish again." Several other answers on here take that for granted. However, the exact text from the PBH says:
The stress of casting this spell to produce any effect other than duplicating another spell weakens you. After enduring that stress, each time you cast a spell until you finish a long rest, you take 1d10 necrotic damage per level of that spell. This damage can't be reduced or prevented in any way. In addition, your Strength drops to 3, if it isn't 3 or lower already, for 2d4 days. For each of those days that you spend resting and doing nothing more than light activity, your remaining recovery time decreases by 2 days. Finally, there is a 33 percent chance that you are unable to cast wish ever again if you suffer this stress.
From a grammatical point, this is as ambiguous as "Peter sees the park with the telescope." Is he looking through it, or is it in his hand?
I am looking for the RAW answer regarding the "In addition..." Is that grammatically modifying the 1d10 damage, in which case the remaining text only applies if you cast a spell before finishing a long rest, or does it apply to "After enduring that stress," in which case all of these effects apply automatically after casting the spell?