El Reg has noted:
Torvalds looses neatened number [release featuring] non-disruptive patches, Z13 support, and more.
[...] The new number isn't a sign of a major upgrade. As we've chronicled, Torvalds thinks that it looks a bit silly when version numbers go beyond x.19.
As the Benevolent Dictator for Life says in his post at the kernel mailing list:
since rc7 [...] It's mainly driver fixes (media, sound, pci, scsi target, drm, thermal..), misc arch updates (nios2 and x86), and scattered fixes elsewhere. Really not a lot during the last week.
After you folks hammered on the 7 release candidates and gave the kernel team bug reports, any drama seems to have been wrung out.
We previously discussed the never-need-to-reboot patching feature that has now been incorporated into the kernel.
(Score: 3, Funny) by JNCF on Monday April 13 2015, @08:21PM
@Torvalds thinks that it looks a bit silly when version numbers go beyond x.19.
so, um, what happens at 19.19?
The major version number is actually written in base-9 to avoid that problem; this won't be explicitly clear until they go from version 8.19 to version 10.0, obviously. But rest assured that there will never be a version 19.19, and therefore nothing past it.