What are you looking to be updated in your alarm clock? Personally, I find updates to simple Android applications that don't seem to need new features somewhat worrying. It often seems to be coupled with a new requirement for network access...
There are a few things I've missed (multiple timezone support, bugs when waking up from lockscreen in some cases), so overall it's mostly 'keeping up' - mobile apps that don't co-evolve with the latest versions of the OS's will stop working at some point.