Could very well just be about Slootman retiring. He is considered one of the most savvy and aggressive tech ceos out there and is arguably impossible to truly replace.
By whom? I used to work at Snowflake, and from what I remember people on the inside were far more excited about the founders than they were about the CEO.
I got the impression that he was meeting expectations for the CEO job, but no more. Though that's a pretty high bar, given position of the company and the industry.