@sirius You can see this anyway you want.
Upgrading a complex software as VM is not an easy task. The testers try to check anything that has been changed. It would be deal to test EVERYTHING in EVERY release. But this is a tradeoff against time and resources.
People have reported issues with various issues on the new VM version and some of them are solved by downgrading again. The funny thing is that some of the reported issues does not seem to have fixed by a downgrade. This would imply that there is another issue with PHP or Joomla upgrade.
Besides this, there WILL be bugs in ANY software and it will NEVER reach zero. In a complex software, depending of where the code error is located, there is a good chance that the majority of users never even experience any faulty behaviour. I am not defending bad releases in general, merely pointing out the fact that testing all scenarios is very hard to achieve. We can take JOOMLA as an example, they have released multiple versions very close to each other, solving and resolving issues and faults. VM is no exception and I personally avoid to update complex components in a live site without checking if my user scenario still works as expected. Validating code is not an easy task.
Jörgen @ Kreativ Fotografi