Well it depends on your conversion rate. But assuming it's ~few percent, then yes it will be hard to measure anything other than very very large effects in conv

Well it depends on your conversion rate. But assuming it's ~few percent, then yes it will be hard to measure anything other than very very large effects in conversion rate unless you're willing to wait quite a long time. You can measure more upper-funnel things though like I said in the GP, which can be very helpful, especially in combination with qualitative feedback, although this depends on what exactly your business is...