Intelligence agencies and companies for which industrial espionage is an actual concern will re-encrypt their data storage, or have already done so. The only risk is on data that was already obtained with a vulnerable encryption. So there is some risk that a few secrets are lost, but it won’t be everything. And if you were to start now and quantum decryption isn’t viable for a decade then any secrets that do get exposed are surely less of a problem than if they were discovered today.