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>It wont be easy or painless but it wont be impossible either.

With data egress costs, all the security infrastructure built up is all bespoke to a provider, not to mention engineers relearning the new provider's APIs and all its warts. The cost would be HUGE. Would be something that would go to a board for approval.

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$2-5M and 1.5 years of time is all it takes.

The biggest problem is getting everyone aligned, designing a plan with minimal rework, and being able to hire incredible talent that is going to cost far more than most companies are willing to accept.

For most companies they'll try with their existing talent and it'll be +5 years and an absolute failure.

So, its not impossible to move clouds, it's just better to buy a smaller bank on the other cloud if you want the move to actually succeed.

And the very sizable opportunity cost of the engineering time spent on that project and not in anything more pressing. If your platform team has nothing better to do then I guess that's 1.5 years well spent, but if they have nothing better to do I have some questions about your company's engineering decisions.

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