But Trillium is not plain-text Markdown, so you’re comparing apples to oranges. They’re completely different approaches at their most base level.
Having been through the enshitification of Obsidian, it was important to me and many others to be not beholden to any vendor’s file system. Trilium notes require Trilium to be instantly usable. My notes are useful and usable in Obsidian, Logseq, VSCode, and others, because they use plaintext Markdown files.