How many quarters ahead do we begin to worry about the “Zeitgeist Reversal Risk” of the “AI Bottlenecks” -trade evolution?

How many quarters ahead do we begin to worry about the “Zeitgeist Reversal Risk” of the “AI Bottlenecks” -trade evolution?

"At some point, capital expenditure may slow and if one peer blinks, the market will immediately question whether others should follow."