It really depends but useful knowledege can be derived from this. If user accounts use sequential ids the id 1 is most likely the admin account that is created as first user.
Time in software is fascinating.
If you say time - everyone thinks he understands it perfectly as we use it in our everyday. But it has so many pitfalls in the details.
If you want the cloud to be a powerful tool you will use their higher level services. These are incompatible and cannot be reasonably abstracted away.
The simple services like files which you could reasonably abstract away in your code you can also migrate when needed.
If you don't want lock in you might be better of with a traditional hosting provider. The cloud is only really useful if you go in with a mindset to embrace what it offers.