Read some articles saying the death of business plan probably since simply because the pace of business is faster for technology companies or start up than you can write. The same people claim business plan more appropriate for slower paced industries such as construction or pharmaceuticals that has long iteration times and well established business models which are not likely to change in the near term. This industry has well understood market information leads to greater predictability.
We may need to agree that technological businesses are fast changing but why do someone put their legs into unknowing territory. It is just for sake of getting start up investment or try out only.
We at Qaasoo strongly suggest some kind of planning need to be done prior putting your legs into any swamp. Remember failure to plan is planning to fail.