You neglected to say if P2 was an "all-time classic"
I have all the P movies but I would not say they are an all time classic.
Movies that are a classic to me now when I watch them latter are not so good anymore.
Like Terminator1 when it came out was mind blowing.
But the Special effects now nearly 20 years on seem so amateurish.
The old James Bonds are another example of that.
The only movies for me that are classics are some old westerns like "The good, the bad and the ugly"