Well, it's hard to contest that Company is about marriage (being married, deciding to get married, etc). While it avoids marriage as a fiscal or religious decision/question, it emphasizes marriage as an emotional question. Just the idea of actually comitting yourself to another person. "Sorry-Grateful" is all about that. I would also say it's a lot more specific than what some other people say, since it's pretty clear that it's about a certain class of people living in a big city where people have a hard time connecting with one another during the 60s/70s. It's also pretty clearly about a guy named Bobby who's getting older and still isn't married but really, actually doesn't want to get married after reviewing the married relationships of his friends (more on this in a second). It's not a plot, but it's a concept and a dramatic question. The vignettes are setups for the songs which definitely have a lot to say, in my opinion. It's not "Who will Laurey take to the dance?" and for this, I am grateful (and not a little bit sorry).
Concept musical is kind of an iffy terminology, but Company wasn't the first one. I'm not even going to try to pinpoint the first concept musical because that's opening the proverbial can of worms but people will argue that West Side Story (dance) or Fiddler on the Roof (maintaining tradition in a changing world) or Cabaret (who knows) were the first. I think Company was the first to dispense with plot nearly entirely. But like I said, it's kind of a stupid word. A Little Night Music is considered a concept musical and I really would argue against that. If it is it's the most disjunct concept musical I've ever heard of.
For me, I relate to what Bobby and the other characters have to say about relationships, so I relate to Company. While I can't say "Ladies Who Lunch" describes my life, songs lke "Sorry-Grateful" and "Barcelona" express what I feel about people and relationships.
One problem I have with the show is the ending, and Bobby's ultimate decision that he ought to get married to be alive, so to speak. Gorgeous song, but still. It seems out of place for this guy who just spent the last two hours showing us that people can't connect to suddenly think he can. Of course the song came into the show very late during production, replacing a number of other finale ultimos including one called "Unhappily Ever After" (which had some of the same or similiar lyrics and melody no less). So the song is an admitted cop-out.
Also, I love the music. I think it's an exciting, funny score with some gorgeous melodies. Company had, if anything, an incredibly innovative sound for Broadway at that point. I love the tecniques Sondheim uses (such as simulating the sound of the dialtone, which reflects the dialogue), the manic vibe of the music. It's a thrilling score and I think that's what keeps people coming back to it time and again. Yes, Sondheim is wordy, but the words offer a lot. And it's hardly SO complicated as people say it is. You might not know who Eliza is or what she's doing on the ice, but I'm pretty sure we can all infer what she means with that line.
Company has a lot to say about the dark side of committing yourself to somebody, and what it means to live in a society where it's okay, maybe even preferable, to remain a bachelor and maintain lots of friends and girlfriends/boyfriends as opposed to getting married and having that sort of life just for the sake of forging imaginary connections. It has a lot more to say than a whole lot of other musicals, I think. But either you connect to it or you don't. I won't even claim it's a matter of getting it. I guess it's just feeling the material.
yr ronin,
joey