What happens to comments which are moved to chat as times passes by? Are they conserved, or do they disappear after a time?
This is triggered by the question Ground state of local parent Hamiltonians and invariance under local unitaries (which got bumped by the Community bot) -- I remember there being a number of comments about clarifying the question, and I don't believe that these discussions have made it into the question. Unfortunately, the link to chat leads to no-where -- is there a way to recover these comments, or are they forever lost?