I guess I don't really know all that much about Gypsy. Over here, in Europe, it doesn't have much of a reputation. I asked number of people and no one had even heard of it. It's more of an American show, I think.
The first time I actually heard some of the score was during Barbra's Back to Brooklyn concerts. I must say - those couple of lines, Barbra's delivery, absolutely stunning. Do I want more!
Barbra too old? Apparently, but I doubt anyone really cares (except for the purists) - and from what I've heard, the script has handled this problem.
Re Sunset Boulevard, I saw the London production in 1993, with Patti LuPone. It's not one of my favorite Webber musicals, but Barbra-as-Norma, fine with me.
I just want another Streisand musical!