The halving is coming soon now. when this happens the majority of the mining hardware will become nearly unprofitable.
Is there any new hardware already in production that will be profitable after the halving?
avalon 6 and s-7 will stick around and a lot of other gear will power off
There will still be some previous though in China. I have been amazed at how long I think some got out of A1 gear due to cheap electricity. When these big companies pay pennies per kwh.... they can keep a LOT of previous gen gear on.
Your are right for most "regular" people come having A6 and S7 are where they need to be. I had to sell previous gen gear off a bit back due to selling and buying BTC far outweighed how much I was going to mine at my electricity rate.