Really interesting article (missed the previous post)! How far is this from being implementable for a practical application such as e.g. a "spellchecker and im

Really interesting article (missed the previous post)! How far is this from being implementable for a practical application such as e.g. a "spellchecker and improvement ideas" for coding? E.g. train with "good" code from open source projects, have it running and highlighting areas with potential errors/improvement potential while you code (not counting trivial errors caught by e.g. lint tools).