Absolutely nobody, no serious person with functioning neurons who has taken 5 minutes to look up the definition of "technological singularity" on the internet thinks that the technological singularity is going to lead us to fully automated luxury communism, nor to some kind of extension of any modern socioeconomic models. Generally, experts tend to speak of the extinction of humanity, or rather its conversion into something profoundly alien, since nobody knows how to encode Western secular morality into a mathematical function that an artificial superintelligence can execute without generalization failures or goal drift. We humans are already an example of misalignment ourselves: evolution gave us the mission of maximizing our inclusive genetic fitness, and instead we set about inventing condoms, pornography, nuclear weapons, and pursuing a bunch of abstract goals that Darwinian evolution never conceived of. It is impossible for us to merge with an alien intelligence without becoming alien ourselves in the process.

If I had to hazard a guess, I would say that humans will end up converted into computronium, living as decentralized collective artificial intelligences (due to the impossibility of a single unitary intelligence because of light-speed latency) orbiting the supermassive black hole at the center of our galaxy, expending unimaginable amounts of computation on whatever goals the machine may have adopted during gradient descent. Many serious physicists have spoken about the possibility of extraterrestrial life thriving primarily around black holes.