I was reading a prediction from fifty years ago or so that by 2000, people would only work a few hours a day or a few days a week, because most work would be computerized/roboticized and technology would create amazing wealth. Most work has been computerized/roboticized, technology has created amazing wealth, but working conditions are little better, and maybe worse, than they were fifty years ago.

Technological advances can't shorten the work hours because even in a society wealthy and technologically advanced enough that basic subsistence is available for free, people still struggle for zero-sum things, most notably land and status. Once a society is wealthy enough that basic subsistence is a non-issue, people probably won't work as much as they would in a Malthusian trap where constant toil is required just to avoid starvation, but they will still work a lot because they're locked in these zero-sum competitions.

What additionally complicates things is that habitable land is close to a zero-sum resource for all practical purposes, since to be useful, it must be near other people. Thus, however wealthy a society gets, for a typical person it always requires a whole lot of work to be able to afford decent lodging, and even though starvation is no longer a realistic danger for those less prudent and industrious in developed countries, homelessness remains so.

There is also the problem of the locked signaling equilibrium. Your work habits have a very strong signaling component, and refusing to work the usual expected hours strongly signals laziness, weirdness, and issues with authority, making you seem completely useless, or worse.

As for working conditions, in terms of safety, cleanliness, physical hardship, etc., typical working conditions in developed countries are clearly much better than fifty years ago. What arguably makes work nowadays worse is the present distribution of status and the increasing severity of the class system, which is a very complex issue tied to all sorts of social change that have occurred in the meantime. But this topic is probably too ideologically sensitive on multiple counts to discuss productively on a forum like LW.