I agree with you in the sense that it would've definitely been interesting to read what Andreas thinks of Ada/D and the discussion surrounding it and your overall comment too.
I do wish that anyone from ladybird team/maybe even Andreas if he's on HN (not sure) could respond to the original query if possible.
I remember ladybird had a discord server I once joined, perhaps someone from the community could ask Andreas about it there if possible since It would be genuinely fascinating to read.
Although a point I am worried about is if Ladybird changes the language again let's say after a discussion of using Ada/D. It might be awkward.