Widewing.....not finding a fault at all with what you stated. IT's true in many instances that the P47 was replaced by the P51. And so were the Mustangs used to replace the P38. By in large though numbers of kills, failure rate on missions etc. success would go with the radial engined aircraft. They just could take a beating.
Read my post on the subject in another thread. From a book written by A.Galland, Henz Bar etc. a sort of after action report on WWII American Aircraft. Heinz Bar was interrogated as to what his opinion of Allied Fighters were. He should know a bit about that he shot down 240 aircraft.
Chapter numbers, and pages listed in the post.
His opinion was that the P51 was the best fighter. Although he didn't face the F4U. He did however face the fighters listed in his interrogation. He regarded the P38 highly.....he respected it's performance at 20K or under.
BTW I get lots of info from Bodies Books. None better. He covers development , production runs etc. Numbers bogle the mnd.
Again by looking at the numbers....the aircraft they fought....their performance and sortie availability, my personal choice would be other then the P38. Although I think it's the most beautiful fighter of the USAAF, In my opinion....better performance and success were found elsewhere. Also over 15,600 P47s were made....... 12,602 of them being D models the largest sub-type of any fighter in history. Total deliveries of Hellcats exceded the amount of P38s produced also. Over 12,000 F6Fs were produced. Number of F4Us produced until 1952 btw was 12,571. Total number of P38s produced close to 9,900 I believe. The F4U, P51 and P47 served for a time after the war.....P51 s and F4Us in Korea. P47s in the ANG and various foreign countries chiefly in South America. I don't know what happened to the 38 after the war.( P51s' produced 15,586 btw)
I think by the total numbers produced of the above aircraft the numbers alone might tell someone what the war dept. thought about each aircraft. Or the Brass of the Army Air Corps. All were produced in higher numbers then the 38 and served longer.
BTW...I also have Bodies book Thunderbolt....another great read. I had to get the paperback addition for the P38 when it was republished. Couldn't find a hardcover print anywhere.
Again everyone has their favorite. P38 was in the right place at the right time and got the first ETO kill. A Condor. But by some accounts didn't perform as well as the P51, P47 and the F4U. Again numbers can be interpeted many ways.. I Like good discussions

BTW...I didn't quote Bodie on anything. Just looked at number of fighters produced, what variant, numbers produced of that variant and where they were produced.