It would probably be like other letters like þ that are no longer fashionable in some languages. Or not-so-small parts of Hanzi. Or completely dead scripts.
That being said, Emoji are a drop in a bucket when it comes to the number of encoded code points. Nicely enough, by encoding emoji outside the BMP, you can now use characters from astral planes in a lot more places without software breaking.
That being said, Emoji are a drop in a bucket when it comes to the number of encoded code points. Nicely enough, by encoding emoji outside the BMP, you can now use characters from astral planes in a lot more places without software breaking.