I really wish the company would talk more about the post-Gabe transition, or at least begin to give us a rough indication of where the company plans to go.
Those of us who have been customers over 20 years often have a pretty significant investment in Steam content, and Gabe is getting old.
No company will ever do that. Even if they did, no one on the planet should expect it to play out as described. The whole anti-DRM position is based on the fact promises aren't worth a damn thing.
They have a vat with brain hookups[0] waiting to place Gabe in, so immortality is nigh. No post-Gabe transition needed.
[0]: https://imgur.com/a/2XbM18n
edit: fixed image link
AFAIK his son has been working there for quite a while and is the heir apparent.