Sure it might be cheaper to use a competitor but if it will cost us 10M to migrate and test the working production workflow then it would have to be 10M cheaper to switch.
This gives our current provider a strong incentive to charge us a bit extra. Say 1/4 the price of the migration. Nobody wants to start a high risk migration that would take 4 years to pay for itself. Easier to just keep paying 2.5M extra. Safer that way and it isn't their money anyway.
Sure it might be cheaper to use a competitor but if it will cost us 10M to migrate and test the working production workflow then it would have to be 10M cheaper to switch.
This gives our current provider a strong incentive to charge us a bit extra. Say 1/4 the price of the migration. Nobody wants to start a high risk migration that would take 4 years to pay for itself. Easier to just keep paying 2.5M extra. Safer that way and it isn't their money anyway.