I'd drop the sub-pentiums (i.e. 386 and 486) entirely. Not that my vote would count...
I once read somewhere that you should _never_ compile in 486 optimizations for use in processors other than the 486. Apparently
since 486 optimized code is padded a lot with NOPs.
Apparently you are much better off on a Pentium or Athlon with i386 optimized code than i486 optimized one.
Hence if we are going to migrate from i386, we should not go to CPU like i486 and just move to a Pentium Classic code (i586).
- Adam
PS. ASAIK, i486 is very similar to i386 if you compare them to a i585 processor. Not too many new instructions there.