— gmail .. no way to change the 30D setting
— windows .. no 30D timer. Trash folder is never automatically cleared
== wpress .. a sequence of devices

1. tags .. t_del_@
2. tags .. t_del
3. title .. change post title to place holder, easily searchable when I need to recycle outdated posts and preserve postId (sequence numbers)
   • .. Alternatively, prefix the title with _place_holder_, but this would be closer to t_del and further from the classic trash

In addition,

• ChangeEmptyTrashTime plugin .. easiest. I set it to 9999 but untested.
• without the plugin, default trash (a device in itself) is 30D

— restoring trash item
Sometimes I “trash” a too-familiar (unfresh) item to improve search. I may want to restore it years later. I know the item may be purged any time.

On another note, I tried “restoring from trash” and recycling the postId just like phone number recycling. It is tricky becuase once the post is moved out of trash, I could lose track of it while its content possibly duplicated somewhere else. So I think large blogs like recrec should avoid this technique.