Handwriting speed vs kanji usage

I'm curious about where you draw the line when writing fast. I often want to drop kanji for kana to save time, but then I lose that visual "anchor" for technical terms. A long string of phonetics is way harder to parse than a complex character once you're reviewing notes later. Is it better to struggle through the strokes for nouns but stick to kana for common adverbs My handwriting gets messy but the shapes still he