Your inference that carrying around a tripod at all times and in all situations is practical is frankly pretty absurd. A good tripod is large, even when collapsed, heavy, and draws a lot of attention.But ultimately it seems to me like a giant leap in complexity to solve a problem that barely exists. I know not all lenses can correct 5 stops of shake, but many can—many more will as time goes on I suspect. And I've got a tripod…..
And setting up a tripod to take a shot can take anywhere from about a minute to several minutes. Holding the camera relatively still and taking a shot takes a few seconds. I'd much rather just have a camera or lens that can stabilize itself instead of having to carry around and set up a tripod every time I need an extra stop or two of shutter speed.
This doesn't even get into places where having a tripod just simply isn't even allowed.
Tripods have their time and place. But saying that they're just as practical or convenient as having stabilization in a camera or lens is ridiculous.