Obsolete means to no longer be produced or used... These things are not obsolete.
They aren't cool / widely used but definitely not obsolete if half the worlds financial systems still run on them.
They aren't cool / widely used but definitely not obsolete if half the worlds financial systems still run on them.
1a : no longer in use or no longer useful
// an obsolete word
b : of a kind or style no longer current : old-fashioned
// an obsolete technology