4 ms·FB (10 years ago atleast) had a timelimit to go from L4 to L5by boredatoms 2y agoFB (10 years ago atleast) had a timelimit to go from L4 to L5lokar 2y agoGoogle as wellromanhn 2y agoThat's because L5 was the terminal senior level (whereas L4 is still mid-level).apwell23 2y agoL5 and chill