Earlier quoted context omitted.
I still use them all the time for just that. You no longer get a choice of 10 different bipolars and 3 different VMOS FETs, but the parts drawer is still pretty useful when all you need is a relay or an Arduino board.
Same here, though it depends on the Radio Shack. There are a few of them near me and one is still a pretty decent "need it right now" electronic components place (with very limited selection) but the other two just sell cellphones and HDMI cables and basically nothing else.
Fortunately, my local Frys has a very good components selection.