I get that SV is a great place to start a startup, all things being equal. But there are a lot of great opportunities that are 8-12 time zones away. And leaving your customers alone for 3 months -- especially if you are trying to grow rapidly during those 3 months -- sounds very risky. Additionally, the money spent living in SV for three months could otherwise be spent on working capital; this is extra true in developing markets where costs are lower.
In the absence of a formal policy change re: moving to SV for 3 months, would you be willing to extend a bit more leeway for founders who really want to get their companies into YC but don't want to spend too much time away from the customers they're trying to please?