I was told that the games are too old and don't hold up as well as when TLOUR released a year later.
And there weren't enough upgrades to the campaigns like MCC.
But so many people didn't play it before. I mean it's three awesome games which got very good reviews in the past and the collection also got good reviews. Shouldn't people just rush in the stores to get it? 80% of 27.7 million (undertracked but let's take at least some number) is a potential of 22.16 million customers if you only count those who haven't played it yet.
Probably more than 80% of the world hasn't watchee Movie X, doesn't mean they want to.
EDIT: you also can't use the global figure of PS4's when talking about US sales as a percentage.