I think it just takes discipline to not change too much at once. I worked with two companies that tried to port from 16bit-32bit code. One did a rewrite. The

I think it just takes discipline to not change too much at once. I worked with two companies that tried to port from 16bit-32bit code. One did a rewrite. The other did it in sections. Neither survived the transition. Technology wasn't the problem. The world just didn't need their products anymore. Though my father had a rotten little shed that needed attention. He tore down and rebuilt sections. Besides a split level roof lines, it really seems like a complete redesign. I think the key is that few things were up for discussion. Also, having a sturdy base to work from made things easier. (and it stayed in operation the whole time.) With code, I see similar ideas. You probably shouldn't tear down and rewrite more than half at a time...and you should probably decide whether the world still needs the original product.