It is perfectly capable for a weekend warrior working on a personal project in a cabin without Wi-Fi, or for a business trip lasting a few days. However, relying on it as your primary workflow is risky due to the 14-day limit and the threat of file conflicts.
When you go offline, Fusion 360 enters a grace period. You can work without an internet connection for up to . Once you reconnect to the internet, the software syncs your work back to the Autodesk cloud. fusion 360 offline
Before you travel offline, use the "Export" function to save a local copy of your designs as an .f3d or .step file onto your hard drive. If offline mode fails, you still have a master backup. It is perfectly capable for a weekend warrior