> That's roughly 5.5 person years of effort to rewrite to rewrite the code base, but that assumes you're working seven days a week, 365 days a year. In reality US workers typically work roughly 2,000 hours per year, or about 250 days out of the year. That means it would take eight person years of effort to replicate the above code base (over ten years for the average hourly hours here in France).

If he's from France, why not just stick to talking about the French working hours? Or just one of the two countries. Bringing up two countries like that was weird to read, but maybe that's just me.