I want to get back in touch with a former professor of mine, who has now recently moved to a different institution. Would I, in my email, congratulate her for having moved to the new institution or should I just not mention it at all?
I am worried it could be understood the wrong way.
For what it matters: both the old & the new university are top 20 in the world, the new university is top 3 (in the relevant field).