Besides the "urge to work on something tangible" another good reason is that you will find the dwindling opportunities in software due to ageism. Btw - I'd per

Besides the "urge to work on something tangible" another good reason is that you will find the dwindling opportunities in software due to ageism. Btw - I'd personally love to team up with someone rather than go solo to reduce the risks, work and responsibility. (snid comment: you took 15 years to realize this!, well, better late than never )