Is it cool to add a guitar solo for songs who didn't have one?

Personally i think that some songs would fit a guitar solo which makes it better to hear and i have 2 guys whom i think that they are the best in this field...

Jon Dretto & Roy Ziv, what's your opinion about the whole "adding a guitar solo to songs that lacks a solo?"

Is it cool to add a guitar solo for songs who didn't have one?
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