For all practical purpose there is no decomposing that goes on in a landfill and it'll never be dug up so unless you plan to toss your bag on the side of a highway I'm not sure the point of a bag that decompresses other than when used for compost in which case I'd be much more comfortable using a bucket i dump and not adding lots of corn plastic to confuse the mix.
https://populationeducation.org/why-...lls-a-problem/
Even the amount of anaerobic decomposing is fairly limited. I've seen studies that show ten year old hot dogs that are clearly still hot dogs.
We want less decomposition in landfill than more. Decomposing in a landfill creates "greenhouse gas" and actual one not CO₂ which is literally plant food.