Step by step. We realize we will not get there in one day.
Its the same as with bicycle paths. Initially - those make no sense, leading from nowhere to nowhere. Give it a few years, and a usable network emerges.
Right now there is serious money and brainpower being poured into sovereign cloud tech. Thanks to the gift of open source and standards, its actually not impossible to create modern systems with zero US dependency.
I fear, though, that as with everything else Microsoft Excel will be the hardest dependency to deal with.