Thanks much, that was a fun little rabbit hole.
I used to know that you didn’t dress all 53, only 48-ish. That was the common knowledge I completely spaced. (I also used to know the emergency QB rules, but I think those changed.) Looks like gameday promotion is new.
TLDR of the article: Any given practice squad player can only be promoted like this twice in a season, including playoffs. And you have to pay them more, and that counts against the salary cap. Probably less than a million, but still, even a half million unexpected cap hit could be a headache.
That’s why it’s not a defacto 55-man roster where you just have 2 “super practice squad” players who you activate every week. Which was going to be my followup question.