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Why just to know remove the restriction of 10 chars and to use any chars you want! The network will give the error and the user will understand what to change, no? Is more easier to do, than to request from IRCv3 groups.

No, of course not. If it was that easy, this change would not have had to be made in the first place.

Remember, IRC and mIRC are used by many users who are not technical. They should not have to understand how IRC works in order to use it. Even a technically-aware user would have difficulty if they tried to use IRC for the first time and received cryptic connection errors. Most users would likely just give up.

So, no, I will not simply remove the restriction.