Is it appreciated to contact old phd advisors with updates on what you have been doing?
I always appreciate such messages from old students. I often wonder what they are getting up to. I don't think I'm unique in that, but some would, perhaps, not be as happy with &quot;interruptions.&quot; But you will get a sense of whether you should continue it if you do this from the response.
Going back in person is also a nice thing to do if you get the opportunity. Not only for advisors, but also for old mentors that you think had a positive impact on your life and career.
If it annoys them, you will hear about it, or they will just ignore you. But I think it is a professional courtesy to keep people updated. Many of them have invested something in you and like to hear how the investment has turned out.