A few years ago I asked my GP (now retired) about the value (that is, helpfulness in working the brain to help delay or prevent dementia) of these various games. At that time we still subscribed to the newspaper, and I usually worked through the NYT crossword puzzle, Cryptoquote, Jumble, and Sudoku.
He said that he enjoyed those sorts of puzzles too, but that best evidence pointed to only the number puzzles as being helpful (so of those, only Sudoku).
Around three years ago I got into doing puzzles online - I enjoyed Wordle, Canuckle (Canadian-themed Wordle), and Quordle (four simultaneous Wordles), and then added Worldle and Statele (both geography puzzles). I got tired of all of them, and started doing KenKen (sort of enhanced Sudoku) online. USA Today has two new KenKen puzzles daily - an easy 4x4, and a challenging 6x6.
And then ... Nerdle! A friend put me onto these, and they're great fun. I got tired of the basic ones, and now enjoy Crosswordle (1 daily, increasingly hard through the week), 2d Nerdle (3 levels daily), and Maffdoku (3 levels daily).
So, for me, the two KenKens, and the three groups of Nerdle puzzles are great fun, don't eat up a lot of time, and are allegedly good for the brain.