> It sounds way closer to the spoken sounds, at least to my western ears.
That's the thing... to some other non-English language speakers, the existing/old romanization method actually is more accurate regarding how the letters would be pronounced to them, especially coming from languages that don't have the same e.g. [ch] or [ts] sounds as written with Hepburn.
The one technical downside I would say to this change is, 1:1 machine transliteration is no longer possible with Hepburn.
That's the thing... to some other non-English language speakers, the existing/old romanization method actually is more accurate regarding how the letters would be pronounced to them, especially coming from languages that don't have the same e.g. [ch] or [ts] sounds as written with Hepburn.
The one technical downside I would say to this change is, 1:1 machine transliteration is no longer possible with Hepburn.