The UK would have been wise to negotiate a settlement with Argentina and sell it to them. Over the long term the UK won’t prevail there. Perhaps they already tried that and Argentina wouldn’t deal
The Falkland defenses are 50 times stronger than they were. Moreover: we now have ultra-quiets (the Astute class) to nullify their surface navy. No-one in Argentina is going to want another ‘Belgrano’.
Plus everyone on the island is British - there’s zero demographic pressure.
The Argies will never get it back.