I think this is likely the first in a lot more cuts to come. Google probably does not want to do it all at once though, potentially because that would be a huge red flag for the whole industry and hurt the confidence of investors in the industry as a whole.

Given that Google makes most of their money by selling services to other parts of the industry, and a lot of the industry runs solely on the confidence of investors, doing a bunch of big cuts all at once would harm them. But they do need to cut back a lot more long term, because investor money is drying up to feed the companies that buy services from Google.