Looking at Debian’s release-critical bugs, you can see that Trixie is close:
Testing now has fewer critical bugs than Stable, and the number is dropping quickly.
About 200 bugs still need to be fixed to get the number down to where the previous releases were done.
Maybe you can help? Bugs blocking the next release can be as simple as missing translations for the upgrade instructions.
That’s a nice graphic. I’d love to see something comparing it to a rolling release or fedora.
Unfortunately, it wouldn’t tell you anything because you’d compare apples with oranges.
But since opensuse has a (multiple) stable and rolling release, how would it look there? More like the testing release?
For OpenSUSE, they’d probably have two different graphs.