Sweden was theoretically neutral during the Cold War, but Stockholm’s perceived closeness to the West apparently motivated Soviet intelligence-gathering activities.
The episode precipitated a decade of intensified submarine hunts by the Swedish Navy. However, despite deploying numerous torpedoes, depth charges and mines at numerous dozens of contacts, no Soviet submarines were apparently destroyed.
Saab JAS 39 Gripen is not as capable as an F-35, but those on a slimmer budget can get this, with super cruise and data link. Like the stealth fighter, which is less skilled in air-to-air combat.