I'm feeling weird being excited about these things, but then I've spent too much time hacking JTwig to get it to do what I want, with varying success.
It even specifically says that you can use an expression in {%import%}, which was the exact issue I had — JTwig evaluated the expression once and cached the result forever.
Gregory's Server
It even specifically says that you can use an expression in {%import%}, which was the exact issue I had — JTwig evaluated the expression once and cached the result forever.