@Wayne
Amiga OS 4, MorphOS and AROS users all have CSS capable browsers. IIRC, there is an older version of OWB compiled for 68k machines. The source code for Netsurf and OWB are both publicly available. If these aren't good enough, the source to Singular, a CSS capable browser for the C64 is also available. If there are enough classic users who browse the web with their machines, surely someone will step up and make it happen?
I'd personally have no problem with you switching to using CSS, but then, I'm an Amiga OS 4.1 user. It is also possible to make a CSS site readable and functional on non-CSS browsers, albeit a bit ugly.
Hans