They're building their own memory safe language, Jakt, but it's not mature enough to be used by Ladybird yet. Dismissing it at such an early point for this reason is pretty dumb IMO, especially considering this is by far the most complete alternative browser engine, and it's getting better at a very rapid pace.
You're right about Discord though...
edit: BTW, I'd wager the complexity of Chrome's code base is still largely responsiblefor the introduction of bugs, even if most are of a certain type. Ladybird is extremely simple in comparison.