[angelsl]

That's essentially what Korean did. They replaced everything with their own morphophonemic orthography.

But even then they still use Hanja to disambiguate sometimes.

[bgee]

I was not even talking about Hangul, the point I made was on using a Latin alphabet. If we are revamping the whole writing system, why reinvent the wheel if the main goal is "efficiency"?

edit: obviously Kana has already been created

[redthrow]

There have been notable Japanese people who argued that the Japanese writing system should adopt Latin alphabets since ~150 years ago.

https://ja.m.wikipedia.org/wiki/%E3%83%AD%E3%83%BC%E3%83%9E%...

I'm personally fine with both romaji and kana (learning kana is not a big cognitive burden anyways).

I'm even fine with kanji (or Latin or anything) if people learn it voluntarily. What's not ok is kids being forced to learn them in school.