Are there plans to reintroduce the gaps/islands part of the Nova redesign, perhaps as an option?

To be clear, I am talking about the gaps between UI elements that were present in early mockups as well as in initial versions of Nova before it was enabled by default in 157. I understand they were a controversial design element with many users disliking them for a variety of reasons (preferences, space utilization, ...) but in my view they were really one of the things that made Nova ''click'' and I was disappointed when they were axed before the final release. My question is whether the Firefox team has made a final decision to remove them permanently and completely, or if there is ongoing discussion/work around reintroducing them, perhaps as something that can be enabled or disabled depending on each individual user's preference?