> When it was implemented 4 byte unicode did not exist. Incorrect. When UTF-8 was invented, it was actually variable up to 6 bytes in length, being capable of

> When it was implemented 4 byte unicode did not exist. Incorrect. When UTF-8 was invented, it was actually variable up to 6 bytes in length, being capable of representing code points up to U+7FFFFFFF. It was only shortened to 4 bytes in 2003. There is no point in history where UTF-8 was only limited to 3 bytes.