You have couched this correctly, because we all know there are people out there who do go around yelling "Rewrite it in X" without thought (where X is the flavour of the month)

I also wanted to say - your description of the /right/ way to align a project with tech X is a restatement of Martin Fowler's "Strangler pattern"

Can you edit your post - "equation because deteting errors" is ambiguous - deleting, or detecting - I cannot work out which you mean