thank god there are companies challenging Bitman's monopoly
Definitely, but there is far more happening behind the scenes that we don't know of yet, which is because of how profitable this industry really is. Smart players don't signal profitability, which is where Bitmain went wrong.
Due to Bitmain's mistake to signal profitability, I'm pretty confident that their share of the pie will significantly decrease before the next block halving kicks in. If they remained low-key they probably would have kept growing.
In other words, we can look forward to far more decentralization in the next couple of years. More decentralization means a stronger Bitcoin overall. This actually gives me goosebumps. It's that aspect what we're here for.