Finishing incomplete degree after a decade to switch to industry I'm considering the possibility of completing a degree from which I dropped out almost a decade ago. In part because I feel I should, in part because I think it could be useful for switching to industry.

Context

Started a degree in Engineering in a non-US university with traditional system of long degree programs(five to six years), roughly equivalent to B.Sc.+M.Sc.
I dropped out from the Engineering degree to pursue a career in Physics, which I did to some extent. I'll be finishing a Ph.D. this year with published work, good academic records, TA experience and all the usual academic stuff.

Even though I don't regret having switched from Engineering to Physics, I have decided that I want to pursue a career in the industry and not in the academy. However, I'd like to keep in contact with the academic world through a part time position as a professor.

I'm 29 years old. Almost no real world work experience, apart from a short internship some years ago.

Questions

Is it advisable to finish the degree in Engineering? I still have all the credits previously earned. I'd take me a year and a half studying full time or three years doing it part time.

Asuming I finish the degree in Engineering, how should I present it in a CV? Just the graduation date? The entire time span from starting date to finishing date like "from 2008 to 2020"? The time spans of the two phases like "from 2008 to 2011 and from 2019 to 2020"?

In the event of having a good postdoctoral opportunity with connections to the industry and real world applications, should I take it or should I start working in the private sector as soon as possible?
If you want to be in industry, go to industry.  Stop taking new degrees.  At least stop for a while.  Go work.
If you are in the US, take the FE/EIT, now.  Start racking up time to get your PE.
"Engineering" is awfully vague.  Mechanical, electrical or what?