My inbound aircraft ended up having a mechanical issue, which meant I spent an extra unplanned night in Rio while waiting for the next day's plane to arrive and bring us back. I wasn't sure how well the vacuum seal would hold up considering I didn't get back to NYC until two whole days after I packed. However, as you can see here on my bed at home, both bags were still completely compressed. (I did have to take a steamer to the clothes once I opened these up, but I would have had to do that anyway, even when simply folding or rolling instead.)
Image Source: POPSUGAR Photography / Morgan Ashley Parker