Photopia is fun to read, but it's not a masterpiece or anything. Apparently in 1998 the idea that we could use a text-based medium to tell a story was a huge deal, and that "wow" moment is what got the game on so many "greatest of all time" lists. Coming into it from my perspective, though, one where IF as ebook with some stray interactive elements is just as common as IF as game or puzzle, this is basically just, yeah, one more IF as ebook. Pretty good. Not amazing.