Oh, don’t get me wrong - I definitely don’t want to chase anybody away from the game, including grognards. But making the game more welcoming to marginalized people is a higher priority to me than retaining grognards.
As a grognard, I say you won't chase away grognards by making the game more welcoming. Here's the thing, and I apologize for name dropping but I think I need to make the point.
Jennell Jaquays, Pauli Kidd, and Mike Monard are part of the old guard who were there literally at the beginning D&D and now pretty much have nothing to do with the OSR because a lot of bigots have taken over, and people like Venger saying he speaks for the OSR (don't get me started).
Others like Tim Kask, Frank Mentzer, Jean Rabe, Tracy Hickman, and Peter Atkinson are a lot more progressive than anything else in their views, and being more inclusive certainly wouldn't drive them away.
In fact, the only vocally conservative old guard that I know of is Jim Ward, and he's not expressed any hostility towards inclusivity that I'm aware of.
I'm sure I'm missing a bunch of names there, but those are the ones I've ever had first hand communication with. Point being, anyone who says being inclusive will drive away grognards isn't a real grognard, because many of the OG are pretty progressive folks. In fact, one of the reasons I started the Chromatic Dungeons project was because it didn't sit well with me that so many who were there at the beginning and helped create this very hobby, were leaving the OSR. And that's just not right.