AW: Why doesn't Ideographic (ID) in UAX#14 have half-width katakana?

[Dreiheller, Albrecht]

No. They are still in use.

One typical usage of half-width kanas is the display of short texts on small devices of embedded systems, like status messages of control units,
for example a one-line display, 30 characters wide, monospace,  with 8x10 pixels per character.

Albrecht

-----Ursprüngliche Nachricht-----
From: Unicode [mailto:unicode-bounces at unicode.org] Im Auftrag von Werner LEMBERG
Sent: Dienstag, 28. April 2015 10:09
To: verdy_p at wanadoo.fr
Cc: m_kato at ga2.so-net.ne.jp; unicode at unicode.org
Subject: Re: Why doesn't Ideographic (ID) in UAX#14 have half-width katakana?

(...)

AFAIK, the existence of half-width kanas in Unicode is
purely for backwards and round-trip compatibility.