I wont deny that asics can be risky. The d3 was a shocker, and the a3 almost didnt make it to ROI on some batches, bitmain can be risky. But on the right batches, bought at sensible times, most have been very profitable. You shouldnt have stopped at the s7, the s9 was a goldmine if you bought it in the first few months, and they were readily available.
If you ONLY KNEW how profitable I've been with GPU's. Especially, during 2016 and 2017. If you ONLY knew. I'm VERY pleased I never bought another ASIC. In fact, I still have several R9 380 rigs I bought in May of 2016 making a profit.
Most ALL of my hardware was purchased in 2016 and HAS REACHED ROI THREE TIMES OVER.
I purchased a lot of NVIDIA's in 2017 and the majority of them have reached ROI.
Page 6 of a forum I created on where my small farm is now:
https://bitcointalk.org/index.php?topic=2865914.100