When will the last bitcoin be mined?

Could you please elaborate on the question of when the last Bitcoin will be mined? With the current mining reward halving schedule, we know that the reward for mining a block decreases every 210,000 blocks, or roughly four years. However, given the complexity of the Bitcoin network and the unpredictable nature of mining participation, it's difficult to pinpoint an exact date. Can you provide any insights into the factors that might influence this timeline? Additionally, is there a consensus among experts on whether the last Bitcoin will ever truly be mined, or if there are potential changes to the protocol that could affect this outcome?