Suggest expanding maximum *set* size from 2^8 to 2^16 values

Is it time to expand the maximum set size from the old
set's maximum size of 2^8 values (requiring a maximum
of 32 bytes) to a maximum size of 2^16 values (requiring
a maximum of 8192 bytes)?

The set size has *not* grown in proportion to available
memory or program complexity. The old set was invented
when available memory was about 640 KB. Now, available
memory is easily 1 GB. I believe that modern computers
can easily support a maximum set size of 2^16 values,
i.e. 8192 bytes, in size.

Note that
640 KB / 32 Bytes = 20,000
1 GB / 32 Bytes = 31,000,000
1 GB / 8192 Bytes = 122,000

The new set would even allow defining
tWideCharSet = set of WideChar;

What are the backward compatibility problems?

--JohnH, 2008-08-07

PS: I just proposed such in QualityCentral report:
http://qc.codegear.com/wc/qcmain.aspx?d=65404