> It has benefits for people with enough leverage (money and formerly labour) to obtain those benefits.

That's pretty much everyone. Even poor people benefit from technological progress.

> I'm guessing that even if the unlikeliest of all unlikely things does happen and we all live off of some UBI some day, the short-term negative effects won't be "short-term" in the context of a human life.

That depends on the pace of technological acceleration. It could be just a few years, or a decade. Which is why I am a pedal-to-the-metal accelerationist. The quicker we get through the short-term negative/turbulent phase towards the long-term positive phase, the better for me. If reversing is not possible, then going quicker is actually better than going slower. Let's get this shit over with.