Three, plus a part-time contractor. One of the team is front-end so had little to do with replacing the Perl part. The truth of it is, in our case it isn't (ye

Three, plus a part-time contractor. One of the team is front-end so had little to do with replacing the Perl part. The truth of it is, in our case it isn't (yet) a full rewrite, and there is still a lot of functionality tied up in the existing codebase. So it's not easy to answer the question about man years, but I would guess around 1.5. The biggest wins for us in terms of lines of code were not the language (we did consider sticking with Perl), but re-assessing the business logic, ridding the codebase of legacy junk and using existing libraries instead of hand-rolled solutions.