P2P is still in place but you forgetting major roadblock that caused disruption of p2p System: The Government. We have no problem using it, in fact we would love to have old days coming back to us right away. Unfortunately there were mega platforms who used to be our p2p escrows but slowly governments started imposing the strict regulations on such platforms. Now they all ask us for KYC thus it breaks the rule of independent third party transaction as written by the creator of Bitcoin.

Moreover someone might say that we can just ask someone to do the transaction on local levels. However, there is increased threat of getting exposed to unwanted peeps or criminals too. This is one of the major reason why peeps just buy and sell over an exchanger, hold them, profit and stay happy.