Thanks for these explanations, but I must be getting old. I remember when swept wings were a huge advance on (real?) first generation (jet) fighters like Meteors. You actually got sonic bangs. A few people might even remember biplanes!
Occasionally US sources call the F-16 a 3rd generation aircraft, with F-22 being 4th generation. This is because the US went very quickly to BVR AAMs so the 2nd/3rd generation as shown above were compressed into one.