There is good and bad things about this. Large companies opening mining facilities so danger to decentralization but other hand network is stronger. Think that we are in for more things like this. Don't know how will plebs get into mining in future.
Discussion
You're right. But I think there is even more ongoing than just a few big companies started hashing more. In the last 6months the hashrate got pumped so hard that it's suspicious. I think there is some Gov involvement in this. Mining operations financed by the money printer.
Probably, someone big. Think that they are all in run for BTC no matter what cost. Printer is working full time.
Just like they have been? One miner at home?
It's not that hard