I prefer the latter, because it's so much easier to filter out posts about Elon than it is to filter out posts about X (without creating a ton of false positives).
Does your filter recognize whitespace? Including a space before and/or after X should catch the posts about the platform while not filtering out posts that just have an X inside a word somewhere. X isn't going to be a single letter surrounded by space unless it's referring to the platform.
Ah, fair enough. I'm almost certain some sort of regex wizardry would be able to solve this problem, but I'm not nearly enough of a wizard to tell you what the proper spell would be. And that's assuming your filter even supports regex.
Honestly, between these obsession posts and all the other non-tech news that gets posted here, I just unsubscribed this morning. The signal to noise ratio in this community is just not worth it to me.