The (slight) drawback for me for doing Random sort is that sometimes stretches of Unknowns or Lifes are context-dependent and that bit of context can help id. Like, for a flower photographed by a bunch of people during a bioblitz, you might get several angles right there next to each other as separate obs.
Side response to other replies: Yes, oldest ones are getting to be the hardest or weirdest ones. I like to mix it up and alternate looking at Unknown/Life olds vs Life last updates (which can help with what other people have caught in the olds recently), but avoid “fresh” unknowns from experienced users (there’s a thread here about potential issues somewhere).
…Found it https://forum.inaturalist.org/t/why-do-some-serious-power-users-add-so-many-unknown-observations/282