This is exactly the same thing I pondered so hard about... If my memories can serve me well, I think I wrote alot of about it already.
Most independent miners quit as it becomes impossible to make profits - especially after every Bitcoin halving. Just imagine going back to the usual 25sat/Vbyte and a ton of electricity consumption and expenses, roughly beating down the general revenue.... Just appalling!
Are home miners going to get wiped out by huge companies that have access to investors capital and cheap electricity? Would that be a danger of centralization?
Not totally! I guess the companies would have the upper hand now.
Decentralization? Could you at least be precise on which area? If companies are diving into the business of mining coins at a cheaper rate, it's because they perceive it to be profitable.. That has nothing to do with decentralization.