I always wonder about threads like this as there is no blanket recommendation. Depends on your level of secure income, risk tolerance, degree of Bernstein’s ‘having won the game,’ projected longevity, goals for residual (die broke vs leave an inheritance), etc. In fact, the answers on this thread aren't meaningful without some of that background...e.g. being 100% equity is one thing for a SIRE, another for someone with no secure income.
I was 100% individual stocks until mid 30’s. 100% equity funds until mid 40’s. Then I systematically added fixed income (mostly 401k’s/TIRAs) to our AA late 40’s thru 50’s until about 70:30. Having won the game, we’re slightly over 50% equity index funds now with the balance in fixed income and cash (sig line).