In the eighties it was Canadian Defence Force policy to buy only twin engine fighters, given the hostile terrain in the Arctic, where any forseeable country defence would be fought. Both the F-20 and F-16 were disqualified on that basis alone.
The Canadian purchase of our Hornets is like our Sea Sprite deal...good money for museum pieces.
NATO countries might have a valid argument about fifth generation fighters given the threats in any forseeable theatre. Since Trump I think the F-35 might make sense, since the Calvary might not answer the phone. But buying a platform without a robust supply of ready munitions is the definition of cynical political malfeasance.
Despite all of the foregoing, does anyone think that the world will ever again see a huge set-piece conventional battle? No one can play armour+infantry against the west, nor can they do blue-water navy fleet action. In no category,in fact, except suicidal fanatic can I imagine wholesale effective resistance to the west. (As it is currently constituted-my position may change next week after the next Twitter storm)