A 16:10 screen is also wider than it is tall.
I'm not sure if I'm being trolled.
Number of usefully displayable lines is not defined by the x:y ratio.
Further, any half-way decent 16:9 monitor can, in a matter of moments, become a 9:16 monitor.
EDIT: I am aware we're talking about a laptop display, so orientation isn't flippable - but OTOH if you're trying to develop code on a 13" monitor at 1200 pixels high - your problem is not a ratio one.