This is interesting because it's a case of "AI taking jobs" but not in the way people normally mean; these massive layoffs are happening not because AI is doing the work they used to do but because capex is sucking all of the operating money out of everywhere. The companies may be forced to replace some of the laid-off employees with AI (as far as possible) but that's an effect not a cause.
Yeah, this is a justification, but still -- they save single digit billions doing this, while AI capex is $150B (same timeframe) and RL spend is $16B. Feels like you could make the same cut from AI capex and barely notice a difference.
4B over 5 years is 20B, which is significant.