If you actually need to use this seriously there are ways of customizing keyboard layouts and text input on every platform and every reasonable text editor.
Sure, but it's absurd to have to set up custom text entry for an unusual character just to use a programming language. Especially when every other template language manages to do so with characters I don't have to customize my text editor to simply type.
Presumably your usage is limited enough not to cover the entire unicode space, and even if you hit the current operator, it should be trivial to update all previous work with a new character, since its prior usage was unambiguous (literally character replacement).
Tbh if you're assuming unicode input (which pollen does), and assuming its easy to write the character (which it is, given that system hotkeys for unicode are available or can be made available on most/all target systems), then it seems to me absurd to use the normal ascii character + escape character operators for embedding functionality in text
I say this because when installing a new OS and it defaults to en-UK locale, some of my buttons on the right side of the keyboard do unexpected things (US here), and I always have to look up where exactly the single-quote button is. I believe sometimes that angle pops up.