I've just recently switched over to it for my day to day work. Admittedly there are rough edges, but I think it's fair to call it viable for sufficiently small

I've just recently switched over to it for my day to day work. Admittedly there are rough edges, but I think it's fair to call it viable for sufficiently small values of viable. I expect to do a major push later in the year to polish it to the point of being really viable.