Because we want people to participate, not have some OP block threads and close them down. That does not promote posting and participation here.
Only moderators should be able to lock threads, not posters.
On the issue of forum space, Djensen is going with some new software soon that will fix that.
What if someone new posts a question that has already been answered frequently and finds the answer? This person can no longer delete the topic.
Moderator does this if requested, or op just leaves his post.
What if you designed a variant or house rule and decided to improve that variant or house rule and wanted to delete the old version? You can still edit your own posts… nothing changed
What about a topic title that may have a typo or some other problem that the OP may wish to correct? This might also apply to polls done incorrectly or perhaps an option intended to be included but overlooked.
OP can always edit and fix that, or Moderator
I understand many of the points for not deleting topics but I see this change in the forum posibly having some less desirable consequences that courtesy and self-policing could have easily remedied.
It is much better now it works for everyone and does not allow “Jr. Moderators”