Not their last album before Roger Waters left the band (that was The Final Cut, the album which followed), but it was far superior, and arguably their best album-- and inarguably their magnum opus.
The David Gilmour-led era of Pink Floyd was ok, but it would never reach the fevered heights and sick intensity of the Roger Waters days.
Some of the tracks are based on his childhood, and seeing how many The Wall tours he did. In 2016 he turned it into an opera. So the album is very personal to him.
A lot of the tracks have to do with what both Waters and Gilmour went through as children, as they both lost their fathers to World War II. David Gilmour got writing credit on a bunch of the tracks as well. And given the amount of work that both Waters and Gilmore put into the album, it’s not really right to say that it was a solo project. Not even to mention what Nick Mason put into it. If you wanna cut out Richard Wright’s contributions, considering that he got fired during this album’s production, that would be fair. 
Pink Floyd - The Wall
Not their last album before Roger Waters left the band (that was The Final Cut, the album which followed), but it was far superior, and arguably their best album-- and inarguably their magnum opus.
The David Gilmour-led era of Pink Floyd was ok, but it would never reach the fevered heights and sick intensity of the Roger Waters days.
It’s good album. But I view The Wall as a Waters solo album than a Pink Floyd one.
It’s an okay album. It’s a rock opera. It’s very melodramatic. There are some great songs.
I go back and forth on Animals or Meddle as their best record, with Wish You Were Here close behind.
Definitely The Wall feels much more like the solo Roger stuff than the best of Floyd.
Though the real purists only like the Barrett stuff.
how do you figure that?
Some of the tracks are based on his childhood, and seeing how many The Wall tours he did. In 2016 he turned it into an opera. So the album is very personal to him.
A lot of the tracks have to do with what both Waters and Gilmour went through as children, as they both lost their fathers to World War II. David Gilmour got writing credit on a bunch of the tracks as well. And given the amount of work that both Waters and Gilmore put into the album, it’s not really right to say that it was a solo project. Not even to mention what Nick Mason put into it. If you wanna cut out Richard Wright’s contributions, considering that he got fired during this album’s production, that would be fair. 
Everyone knows Ummagumma was their best album, they’re just too scared to admit it!