Hi Don,
4.7 will need to have some tables. Although in my opinion full compability must not be the target. But rather just graceful degradation.
If you check this on style.tigris.org
http://style.tigris.org/nonav/docs/sampler.html (this is NS 4 compat, but with not too messy tables used)
http://style.tigris.org/nonav/docs/sampler_inst.html (Using the same exact html and just changing the css you get this)
If we strive for full compatibility with NS 4 then we can throw away any real progress. We just support it but not full compatibility. As in same exact look on NS 4 and NS 7. The target must be lower. Like:
- same layout
- pages are still functional
Aside from that I think we should not target anything else. Using simpler html targeted for NS 7 or IE 6 is easier to add compatibility stuff for NS 4. The other way of making NS 4 full compat and removing stuff for newer browser is harder. Well atleast this is my opinion and based from my experience.