You dont need to wait for that one day. Right now I’m using cloud servers from hetzner and store data in Backblaze S3 and train models on Lambda or even vast.ai.
You can, but one has to be careful with the transfers. If not you could incur ridiculous costs.
And some architectures are still prohibited - any replicated database across cloud vendors - imagine Cassandra hosted across AWS and Azure to protect against one cloud vendor outage.
And some architectures are still prohibited - any replicated database across cloud vendors - imagine Cassandra hosted across AWS and Azure to protect against one cloud vendor outage.