When I do a Google search I'll often find an on-point question answer from 5 years ago or more. That's good. This database is great for that.
As a practical matter, as I work and get stumped by something, I very often use Google to get close to the answer I am seeking.
Sometimes it is in the form of a formal answer and sometimes I find what I need in comments.
Sometimes there are a lot of comments. Showing them all would be overkill.
So the system designers wisely set it up to automatically give the user the option to show the rest of them or not.
The comments are still there, and only those interested enough to see them will do so.
The frustration index goes way up when a fruitful community of users are discussing the issue right on point of the Q or A then to have it stopped by a "moved to chat" message with a useless link to a truckload of unrelated stuff.
The "Moved to chat" link is a brick wall. Why even have that link? Why not simply move off to chat without impacting the postings (including the comments)?
Why not just let the system handle it like it was designed to do?
Here is a recent example of why to preserve visible comments:
In the answer there was no need to rewrite everything that had been done via comments. The accepted answer is short and sweet, simply referring to the comments to explain itself.