They don’t have to be scared, there are tons of corporations that can’t manage any kind of infrastructure effectively and are begging to get to the public cloud.
True now, 5-10 years time though? When they finally get to the cloud and realise the costs, they will look at opportunities to reduce their bills.
I anticipate many “we have to get off the cloud” projects in the future for sure, but I think it’s clear that the demand for “public cloud” has not been met by a long shot. There is much more room for the market cap of public cloud to grow.