I'm another astrophysicist who left academia for industry and this post definitely speaks to me. I wouldn't go so far as to say that I regret my decision to le

I'm another astrophysicist who left academia for industry and this post definitely speaks to me. I wouldn't go so far as to say that I regret my decision to leave academia, but I will admit to wondering what could have been if I had stayed. After getting my PhD I had a postdoc position lined up with a professor I was excited to work with and had won the NSF astronomy & astrophysics postdoctoral fellowship. (It's not the most prestigious fellowship in astronomy, but it's not too far down the list, depending on your sub-field.) My feeling at the time was that I was a good enough researcher that getting postdoc positions probably wouldn't be a problem, so I could stay in the field for another ~6--8 years if I wanted to. And if my research had gone well in those jobs there was a reasonable chance (say, 50-50) that I could get a tenure-track job somewhere. But I wasn't super comfortable with that risk along with having very little freedom as to where I would live. (Having a two-body problem didn't help either.) I also factored in the opportunity cost of staying, say, ~8 years in postdoc roles before switching to industry and figured that if there was a good chance that I was going to leave academia eventually, I should do it sooner rather than later. Part of this was motivated by some researchers I interacted with who were really smart, did great research, but just kept jumping from postdoc to postdoc and couldn't land anything permanent. While I do miss the astro research, I have learned a lot from industry that I would never have even known existed had I stayed in astronomy. (This may be more a function of working at a startup than industry work in general.) I'm not sure what work OP is doing specifically, but the industry work I've been doing has been pretty fulfilling. It helps that I've mostly been working on applying ML to health technology. Industry is a big place! There is a lot of fulfilling work out there even if it can take time to find it.