Myself...
I can easily admit that I like them for nostalgia. I carry heartless, soulless Tupperware. I do not love the very few plastic guns I own, at least in the way that I totally fall in love with real metal handguns.

I think the S&W 1-2-3rd Gens are awesome handguns and I never (ever!) get tired of them -- but with that said, if someone is asking me how they compare with modern Tupperware for carry, duty or defense, I can't really argue for an old-tech DA/SA because I believe it is a somewhat more complicated system than modern striker fire.

When it comes to my absolute love and passion, I'm all about the discontinued S&W metal pistols. But they are not my first choice for EDC or home defense.