A memory leak is entirely software. Hardware will make no difference, except in the case of Apple Silicon vs Intel — only because they use different software to accommodate their different hardware.The hardware models that are close to Apple's cutoff of older models for this major system release. I have a 16" M1 Max MBP (stock model) and haven't seen memory leak issue. But later reading it was discussed this had more to do with CTO orders than standard stock MBP builds. Some other also had no issues as commented.