On: Some thoughts on JSON vs. S-expressions (2012)

[fmakunbound]

    #S(HASH-TABLE :TEST FASTHASH-EQL (ORANGES . 2) (APPLES . 6) (PEARS . 5))

Could have been an ALIST:

    ((ORANGES . 2) (APPLES . 6) (PEARS . 5))

or even a PLIST:

    (ORANGES 2 APPLES 6 PEARS 5)

Those allow for ordered, and even duplicate keys unlike the hashtable approach. No idea if that's applicable to JSON reading though...