I'm mostly afraid of a post-Gabe era.
Gabe is a gamer and pretty much holds the PC gaming industry together after saving it multiple times from obscurity, making a store that's more convenient than piracy, plus he makes all those customer friendly services and products.
...What would happen once he's gone?
He's not gona be the head of Valve forever, and at some point he'll leave due to retirement, or "the other reason".
Who's gonna take over?
Will it become like current Disney/EA, buy other successful brands, destroying franchises and good will with predatory practices, and make everything woke to appease some shareholder?!...