There’s not many flights I’d consider for possible upgrade next year so before in decide whether to choose a SWU is there a way to search for availability or do you need a SWU to search? Basing this on the TPG write up on this here: https://thepointsguy.com/loyalty-pro...wide-upgrades/

excerpt: If you want to use your systemwide upgrades on long-haul international itineraries, I recommend first looking at upgrade availability on your longest segment. Ideally, you'll find and book an itinerary with upgrade availability on the longest segment, as then you can use a systemwide upgrade to clear into a higher class of service shortly after booking. Otherwise, set up upgrade alerts or add yourself to the waitlist to hopefully use your systemwide upgrade as your flight nears.