Richard Wordingham wrote, > And doing it reasonably well could be a lot of work. > However, I don't see any good reason to discourage > fonts from doing it by default, which is what is now > being proposed.
Some people studying Han characters use the IDCs to illustrate the ideographs and their components for various purposes. For example: U-0002A8B8 𪢸 ⿰土土 U-0002A8B9 𪢹 ⿰土凡 U-0002A8BA 𪢺 ⿱夂土 U-0002A8BB 𪢻 ⿰土亡 U-0002A8BC 𪢼 ⿰土无 U-0002A8BD 𪢽 ⿰土冇 U-0002A8BE 𪢾 ⿰土攴 U-0002A8BF 𪢿 ⿰土月 U-0002A8C0 𪣀 ⿰土化 U-0002A8C1 𪣁 ⿰土丰 It would be probably be disconcerting if the display of those sequences changed into their respective characters overnight. Such usage might be limited to scholars and students, and a desire for default composition might outweigh scholarly concerns, but IMHO to say that 'doing it reasonably well at the font level would be a lot of work' is a vast understatement.