This isn't going to happen. I think Satoshi was clear in the whitepaper that all the transactions must be publicly announced. Making such big change would censor it and devalue it.
I don't think Satoshi would be against changing and improving Bitcoin protocol because if you read some of his earlier posts you could see that he was talking about key blinding and group signatures back in August of 2010.
I tend to agree with Edward Snowden here when he said that if Bitcoin would introduce some privacy upgrade in base protocol, there would be nothing governments could do about it now,
and with more important changes in Bitcoin code I believe that most of the shitcoins would not even exist anymore.
Further we go in future it would be much harder to make this changes and I have no doubt that centralized exchanges will have more strict rules and regulations in future, and there will probably be more and more ofac mining pools like Marathon.
It's deflationary.
Bitcoin is actually mined every day and it has some inflation that is much lower compared to fiat inflation but it still exists and it is about 1.45% currently.
We can however say that millions of bitcoin are lost so far that would somehow negate that inflation.