I should clarify the purpose of x-heights and how it relates to legibility. Taller x-heights leads to better optical legibility in small sizes. Shorter x-heig

I should clarify the purpose of x-heights and how it relates to legibility. Taller x-heights leads to better optical legibility in small sizes. Shorter x-heights are usually found in fonts such as Source Serif Pro for obvious reasons - it leads to be better shape recognition of the words and improved readability. Excellent in long prose and text use. Usually "Book" fonts have very short x-height. One of my favorites is Nexus Serif: https://www.martinmajoor.com/4_nexus.html https://www.martinmajoor.com/4_nexus.html For UX/UI - ever wondered by EXIT signs are in all caps and not written as Exit? It's because of the relation of x-height to legibility at small sizes or larger distances. This is the same for avionics, warning labels, etc. Inter isn't a good font for UX/UI IMO for the same reason why Helvetica and SF Pro aren't. They're general purpose fonts - neither good at text nor UX/UI but somewhere in the middle.