Possibly because there's a hat you can earn for being involved in the closing of questions:
Expect the queue to settle down once people have won the hat or when Winterbash is over for this year.
Automating flagging is something which you're almost never likely to see. If you feel that you're posting the same comment over & again - this userscript gives a popup with 6 configurable auto-comments, which you can easily click to insert.
Reconfigure the comments to your most used boilerplate ones & you could save some hassle of retyping them ...
As mentioned in the comment, if a site is not present under the Migrate list, click on Flag → other (needs ♦ moderator attention) and mention to which site it should be migrated to.
We'll migrate if it fits
Did this help?
I'd like to see some numbers on the actual number of questions that were closed by the community alone, but I know it's significantly higher than it was for 5 close votes (I can likely count on one hand the number of 5 vote closures we've had in the last few months.
Did it hurt?
No. It kept things a bit neater, eliminating things like ...
The votes have aged away. As per Meta post.
Certain flags and votes are invalidated if they are of sufficient age.
The rules have changed over time, but currently they are:
The most recent Close or Reopen vote on a post:
if the vote is older than 4 days
the question has >= 100 views
or there have been no new votes (of the same type) since
The question has now been closed.
As I mentioned in my comment, this was not due to any misjudgement on your part; the flag was not explicitly moderator declined, but autodeclined when "Leave Open" was selected in the CV queue.