For most people I know/"know", I'd think an email would be better[1] :) And also, this relies on the phone not waking them up when the text arrives. If not, I admit that's perfectly sensible thing to do.
[1] Some people might prefer a paper note, but if you're used to tasks arriving electronically, a note is just something you have to transcribe.
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[1] Some people might prefer a paper note, but if you're used to tasks arriving electronically, a note is just something you have to transcribe.