If the question is "is it still profitable" than I would say it is only profitable to big companies, and even then it is a big question mark. We are talking about 900 bitcoins mined per day if I am not wrong, which means at 100k valuation per bitcoin, that would be 90 million dollars per day mined so there is a revenue we know that much.
The real question is, between what these companies spend on machinery, and electricity, are they spending 90 million a day? I do not think so, they probably spend less, but it is not really a high margin, plus remember that new miners come out all the time, so that means we are going to end up seeing them spend a lot of money on new machines all the time as well, hence that would mean the profits are quite slim.
Plus they're profitability would definitely depend on the demand for block space in the Bitcoin network. But will there be demand for block space, especially when there's a large part of the Bitcoin community that wants the network to be used merely for financial transactions? I believe not, and it also limits Bitcoin's use case.
If you ask me, if users want to use Bitcoin for on-chain trading dick pics and fart sounds without breaking the consensus rules, than just let them. It would be a bigger problem for the network and ALL of its participants if the demand is not enough to pay for security.
