My 11 year old ThinkPad still runs Linux fine. It is up to date and as secure as that makes it. Firefox, Thunderbird, VSCodium, Zettlr are snappy, background processes from python or postgres are stable. I have confidence a similar ThinkPad bought today will be fine in a decade.
An 11 year old Apple isn't in the same state. An M* processor is a gimmick for today's needs; it is a niche platform solution that's reactionary to niche needs of today; that's not a design for the future. Hence M1, M2, M2, M4, M88, etc. The Apple OS will not support decade old hardware, it's not in the business model. You have a fine computer for today that is designed to be disposable. Like buying a plastic stool instead of a wooden one. The plastic one may be lighter, in a variety of colours, your friends might go for them, and it could lie about being privacy focused, but in the end it's a plastic stool not a wooden one.