Reports on Twitter, Reddit, the MacRumors Forums, and the Apple Support Communities consist of users reporting their Mac warning that the system has 'run out of application memory' or that specific applications are consuming ridiculously high amounts of RAM in Activity Monitor.
It's difficult to pinpoint precisely what models of Mac computers are affected however, the range is relatively wide, including the newly released 14-inch and 16-inch MacBook Pros. Some users who recently upgraded to macOS Monterey are experiencing a bug known as a 'memory leak,' a scenario in which a specific macOS process or application is bugged out and stays running for prolonged periods in the background, consuming abnormally high amounts of memory or RAM.