There is a feature-request for this, but I'm actually raising this as a bug, as I'm not asking for a feature; the feature exists already (and will continue to on every other site that isn't Stack Overflow). This is a bug; either due to a regression, or (at best) an oversight and has adverse effects on accessibility.
On the new comment layoutnew comment layout, once a comment reaches an "age" of "over a year ago", that becomes its timestamp value. This is regardless of whether the comment was posted one year and a second ago, or 17 years and three months ago. The only way to access the actual date and time a comment was posted is by hovering over the "timestamp" and waiting for the tooltip to load. This is a severe accessibility and data quality problem as some devices, such as screen readers or touchscreen devices, cannot access tooltips. This means that from such devices comments created on 2024-08-28, 2015-04-13, and 2009-10-19 would appear to have been posted on the same date, i.e. at some point over a year ago.
The timestamps of comments are valuable; technology evolves and what might have been "good" or "acceptable" in 2010 might not be in a version from or after 2023. Many comments are directly concerned with these technological changes, but users now have no easy way to see that crucial context. Moreover, seeing the timestamp made it easy to see if a comment is relevant to the current revision of the post; if the post was (last) edited in 2022 you have no (easy) way of finding out if the comments were made before that edit or after.
The timestamps on comments need to be restored to work the way they do now, where after 2 days they show the full date and time, not some vague and useless statement.
For reference, here are what timestamps look like currently:
And what they will look in the graduated experimentexperiment:
