Hi!
As can be seen on the graphs from XWiki Standard Bug Statistics Dashboard, the gap between Created and Unresolved issues widened.
This means that the BugFixingDay strategy worked for a while, which can be observed starting with 2013 until end of 2014, but currently is no longer enough, this is why it would be good that 1 out of 2 releases for 2021 to be a bugfix release.
Thanks!