My parents got one of those Sous Vide things years back as a gift, but I don't think they ever used it. Maybe next time I'm over there, I'll bring some steaks and say, "hey, why don't we try that Sous Vide thing on these?" But there's a 50/50 chance my Mom will say, "oh, that? I regifted it"
Although it's a lot of work (and much more expensive), I've done some really good steaks on a BGE with a grill grate. But lately, I've been pleasantly surprised by how well an air fryer does with steaks. I was skeptical at first, but after enjoying a dozen or so excellent steaks, I'm quite pleased. Prep work and clean up is faster, and another added benefit I've discovered about air fryers: they're relatively portable, and it works easily with a generator when the powers out.