\setupbodyfont[dejavu,10pt]

\setuplayout[middle]

\starttext

\startbuffer
Is it \mixedcaps {OpenType} or actually more {\bf \mixedcaps {CloseType}} as
some aspects are hidden in applications by their inventors?

\dorecurse {8} {

    \definefont
        [MixedCaps]
        [CurrentFont*default cp \the\dimexpr1.0#1\exheight]

    Is it \mixedcaps {OpenType} or actually more {\bf \mixedcaps {CloseType}}
    as some aspects are hidden in applications by their inventors?

}
\stopbuffer

\typebuffer \getbuffer

\stoptext
