Speaking of this /a/ had definitely less than 50% of its posts archived yesterday and is on track for a similar fail today.
It's frustrating because it is not an obvious "OK, it's just down" kind of problem, it's a roulette like "you think it's working but go and use it and whole threads you clearly recall and can exactly bring up aren't there". I've seen some threads archived incompletely with quotes linking back to posts that aren't there.
This is on top of the image problem.
Most annoying of all is this seems uneven in distribution; some boards have much more stable archiving than others which is just fucking horseshit, it makes it very much seem like a solveable thing and this admin does jack squat. This problem has been coming and going since at least February in force.