Do you need a PhD to progress in a career in research roles?
I was an Applied Scientist Intern this summer at Amazon, got a return offer, also interviewing for ML Scientist at Apple. I will be graduating with a machine learning focused MS, was wondering what career progression looks like if I don't do a PhD. I understand that a PhD would help to get into roles like these, but would not having one adversely affect my chances at promotion? (assuming everything else equal, i.e. same quality of work).