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A STATEMENT ON LEGACY SUPPORT
In the terminal world there is much cruft that comes from old and unsup‐
ported terminals that inherit incompatible modes and escape sequences
which noone is able to know, except when he/she comes from that time and
developed a graphical vt100 emulator at that time.
One goal of st is to only support what is really needed. When you en‐
counter a sequence which you really need, implement it. But while you
are at it, do not add the other cruft you might encounter while sneek‐
ing at other terminal emulators. History has bloated them and there is
no real evidence that most of the sequences are used today.