Do not max out your 401k at 23 years old. If you have any plans of purchasing a home, car, etc. in the next 5-10 years just setup a secondary brokerage account that you can actually withdraw from penalty free. It’s still money saved, you just aren’t locking it up in a tax deferred account. I personally do 12% (6% max match + 6% extra to keep my hands off). My expenses should come out to ~20-25k this year. 75k-82.5k salary but I make several thousand dollars investing in my separate brokerage
My reasoning for not maxing out at 23 beyond medium term large purchases is also that if you have your retirement saved up solely in a retirement account you are going to end up in a position where you either A) have to open a secondary brokerage closer to retirement in order to retire early or B) have to take penalties for early withdrawal. I’d also rather take higher risks at this age with the freedom of a non-retirement brokerage account