Retired Microsoft engineer Dave Plummer has expressed concerns about the hardware requirements for Windows 11, questioning whether they are genuinely for security or a sales strategy. He noted that many PCs excluded from compatibility due to the lack of TPM 2.0 or modern CPUs are not necessarily old or underpowered. Plummer highlighted that Microsoft's history of discontinuing support for older operating systems, like Windows XP and 7, was typically based on security and compatibility challenges. He warned that future versions of Windows could impose even stricter hardware demands, potentially leaving many functional PCs unable to upgrade. Additionally, he pointed out the ambiguity behind Microsoft's refusal to allow users to opt out of security enhancements if they lack the necessary hardware, raising concerns about potential e-waste. Many users are hesitant to transition to Windows 11, and while hardware compatibility is a factor, it is part of a broader decision-making process. Microsoft’s shift towards a subscription model and the introduction of new hardware requirements suggest a significant evolution in Windows.