The W3C introduced XHTML as a standard because "Today's market consists of different browser technologies, some browsers run on computers, and some browsers run on mobile phones or other small devices. The last-mentioned do not have the resources or power to interpret a "bad" markup language."
http://www.w3schools.com/Xhtml/xhtml_why.aspSo (ignoring CSS and Javascript) can't simple valid-XHTML be processed on an Amiga without pulling the whole machine down?