If you recently made a comment that wasn’t posted please accept Owl’s apologies and re-send it to Owl’s email. (Owl thinks it related to the solar farm post)
Owl gets a lot of spam and very occasionally a genuine comment gets dumped in the spam bin. This time it coincided with one of those occasions when, overnight, WordPress updates the blog admin pages to give them a completely “new look”, leaving Owl’s wings flapping and head spinning. In the learning process the comment got deleted.
Moral of the story is: never try to teach an Old Owl new tricks!