I don't know about actual user numbers, but occasionally I lurk on the Chinese language forum and there are increasing numbers of vocal users over there who are also complaining about the old Chromium kernel version and extensions that no longer work. It is not just English (or other language) speakers here who are unhappy, if that is any consolation.
Which translates as There have been frequent updates recently, and they are all official versions, but why don’t they update the kernel? Comments like these are frequent with each update.