Mail & Unicode

I really hope that future versions of Thunderbird, etc. will have Unicode UTF-8 as the default for mail. Although there may be some legacy mail programs that do not support it, these need to get with the program... This won't affect English speakers really, so it might be easier for me to say, but I think one should just be able to send an email in any language or combinations of languages by default, as Unicode offers... I've changed my default Thunderbird option, but I don't think that alone will have much of an impact, even if a good number of other people do so too... Thoughts?