Social Democrats are just supportive of welfare and labor as far as I understand it. If the Scandinavian countries are social democracies, as is commonly held, then I don't see much resemblance to socialist countries that used to exist. (Cuba is probably the last socialist country. I don't know what to call the Hermit Kingdom, which looks like some bizarre hybrid of monarchism, military rule, and other things. It's a fascinating polity, in a morbid sort of way. North Korea certainly is not Marxist, since it holds man to be the shaper of history instead of the other way around.)
It's not that social democracy is anything of particular interest to me. I find all politics and forms of government interesting. One difference I can spot between social democracy is that it is comfortable with the existence of businesses and that socialism aims at worker-organized industry. Or something like that. Labels abound. I should note I have never felt comfortable with the oh so popular sliding scale of capitalism and socialism.
Never said being a social democracy is a good thing, Mortal, only that there is a difference between being one and being a socialist "republic". Sanders is wrong, I believe, to call himself a socialist. The general public doesn't seem keen on the details of certain labels. It's kind of like how free market capitalism and crony capitalism are another source of confusion, wouldn't you agree?