I'd rather just have a world where people move a little slower, care less about efficiency, appreciate the smaller things in life, and stop forcing endless upgrades of every kind on everyone with new phones, new apps, soulless art, and new ways of doing things. But that's just me.
Efficiency improvements tend not to create more leisure time, because one person working eight hours a day remains more efficient than two people each working four hours a day. The reasons behind this are communication and training overheads. If AI leads to a world where people don't really have to know anything to do their jobs - just provide high-level judgements that LLMs seem farther away from than they are from…
For efficiency improvements to create more leisure time or even let the bottom 50% retire early, society would need to be radically restructured so that its locus of control is not capital. This would probably only happen with violence.
This might happen one day, but for now, efficiency improvements get capitalized into the ponzi-esque stock market while the efficiency gains which could be realized at the bottom of the pyramid get "burned off" via inflation targeting of 2%. A quirky side effect of this is that the vast efficiency improvements we have seen have not even been allowed to prevent a pensions crisis.
The Economist, serving in its capacity as a dutiful servant to neoliberal capital, frets equally about AI inevitably causing us to "run out of jobs" as it does a demographic crisis inevitably causing us to "run out of workers" (https://archive.ph/6hgYq).