[magicalhippo]

Well, UTF-8 is an encoding of Unicode, which allows for surrogate pairs and all that jazz which can be a bad fit for fixed-pitch text.

For example, take a Zalgo text generator[1] and try to make the result make sense in a fixed-pitch (monospace) setting.

At least that's my interpretation of what he tried to convey.

[1]: http://eeemo.net/