If you only need to keep Office around to occasionally edit a file while preserving formatting, there’s now another option in 2026 - get a coding agent to do it for you. I’ve had Codex make substantial edits to financial model spreadsheets a few times, and it knows enough about how to modify office XML files to do that work correctly. Occasionally Excel didn’t like some of the files at first, but the view-only version of Office for Mac works well enough to allow Codex to discover and fix any incompatibility. Between agents and LibreOffice, no need for Office anymore.