Yeah, definitely improved a ton in the previous decade or so. They're not quite "there" if you want a burger for like a nice, thick, greasy medium patty in the middle. Like if you want to focus on the meat at all, then yeah, they're not there.

But.. if you just want like a fastfood type of burger with more toppings than patty, like a Whopper or something, then I'd say they pretty much are there.

I don't remember if it's exactly the beyond meat that burger king uses, but they have a nice vegan patty. One time they had Whoppers on offer, 3€ a piece, vegan and beef. Max 5 per person. I ordered 3 vegan and 2 beef I think. We ate them with my brother, and couldn't tell which was which. Turns out we probably had only them vegan burgers, but eh, didn't seem to matter that much.

So for replacing one of those thin, well done mcd/burger king generic patties? I think they're there. For replacing a patty made out of fresh meat and done to a proper medium? Yeah, they're not there.