Intel made a couple of points that cleared up a lot, starting off with the fact that TRIM is indeed alive and well in Linux, and it comes down to having the right software installed to take advantage of it. I was pointed to a PDF that explains how the command can be executed (section 7.10.3.2), and that's all that's needed for a software engineer to implement the feature, whether it be someone in charge of a distro, a piece of software, or a file system.