A quote from an authoritative reference book on Myanmar/Burma:
Burma held the world’s most extensive teak reserves (much in demand for building because it was impervious to termites).
and another from the (sometimes reliable) Wikipedia:-
Teak is used extensively in India to make doors and window frames, furniture, and columns and beams in old type houses. It is very resistant to termite attacks
If Spitfires were to be buried, for whatever reason, using teak crates may just have been a very good decision and preserved them in better shape than has been suggested. At least we can hope that this whole story will not remain a mystery forever; Spitfires either will or will not be found. Unless given really good odds I wouldn’t bet on either result, but wouldn’t it be good news if…………………….