Everything must end after all; but I get wildly different answers when I ask that question to people around me. Some think it’ll happen in <10 years as other platforms like glasses take over, others will say it’s gotta be many decades away given how much the iPhone is a cash cow for Apple and they’ll milk it as long as they can.
FWIW, the first year without a new iPod introduced was 2011, and the product line was discontinued altogether in 2022.