As an interested outsider (no connections or technical expertise), it seems like Keller’s tenure at a company very frequently coincides with very successful pro

As an interested outsider (no connections or technical expertise), it seems like Keller’s tenure at a company very frequently coincides with very successful products being developed. Is that the view from inside the field as well? Is it seen as a bit of a coincidence, or is he really that good of a technical leader?