I think people look at the Lightning with very rose tinted glasses, it was actually a very poor aircraft in terms of doing the job it was intended to do, the main thing being the incredibly limited armaments, only two short range IR missiles with a dubious reliability, and a pair of cannons (or no cannons at all in some versions)
It may have been fast, but if it was fast and it had no teeth, then what good was it really as anything other than a psychological band aid?
Other aircraft of the era had comparable performance, and the ability to actually do something useful, hence why it was quickly replaced in the role of the primary RAF interceptor by the Phantom, which had its first flight only four years after it, but had a much more respectable armament, and as a dogfighter that was asking too much of it, especially against what it would fight if it ever went to war.
Of course some will be angry at me saying that, but those are the facts, top notch performance, sub-par as an actual USEFUL weapons system.