In the Byte magazine article that Woz wrote about the Apple II (Vol 2, No 5), on page 43's last paragraph he mentioned how SWEET16 was useful and he estimated that about 20% of the Integer BASIC code could have been weeded out by selectively applying SWEET16.
While the wording suggests that Integer BASIC did not use SWEET16, it does leave me wondering if it did and if not, why not especially considering:
- The savings it would create in the ROM.
- He states there would be no observable performance degradation.
- All Apple II machines being shipped at the time included the Integer ROM and thus SWEET16.
So while I'm expecting the answer to be that it wasn't used, I am a bit curious why not especially since it would have given the II another 724 bytes or so of ROM space to do other useful things.