[adrian_b]

Actually many ridiculously expensive "flagship" smartphones do not have DisplayPort and some do not have even USB 3.

The chances to find DisplayPort in what nowadays have become medium-price smartphones, i.e. $500 to $600, are about as good as finding DisplayPort in a "flagship".

[joe_mamba]

Which flagships (other than Apple), don't ship with display output?

AFAIK Samsung, Google and all major Chinese brands have display output on their flagships.