Ask the same in your own infrastructure. They'll give even worse estimate.
The thing with the cloud, is that it's public, they all follow the same stuff and their goal is for you to migrate to them. They got an hundred similar situation as yours.
> At the same time, your competitors are actually trying to create products that meet their customers needs while your resources are tied up in migrations.
How is that different from your own infrastructure? If you have to migrate, you have to migrate... whatever is the source and whatever is the destination, migration is migration.
Once you decide to move from on prem to either of the cloud providers you get the benefits of being able to take advantage of scale efficiencies, letting another company do the “undifferentiated heavy”, elasticity (not having to provision for peak capacity), a global infrastructure, quick provisioning of resources etc.
Yes depending on your use case, you can gain benefits from moving off prem/colo to any cloud provider. The benefit once you move to any of the providers to switch providers is negligible.
That’s not even including the training involved. At the same time, your competitors are actually trying to create products that meet their customers needs while your resources are tied up in migrations.