When it first starts to be compromised, I think it is likely it will maybe it will be possible to spend a not prohibitive amount of time compromising one address… let’s say a year. Then as things get more and more sophisticated the whole shebang is completely compromised.

The timeframe is usually 10-20 years from now when you hear security researchers mention the horizon.

I prefer pessimistic and consider that safety is more likely 2-5 years with great confidence and reassess based on current news at regular intervals.