You could already do everything you are proposing t-strings will make easier with just strings or f-strings.

‘query: SQL “Select …”’

“Wait” you’ll say “then the function taking the string has to parse the string and will have to add ugly logic grabbing variables from globals()!” Ah yes. That’s such an ugly solution… let’s instead codify just that as the official best practice and sell people on it by prefixing a t to the string so they don’t notice…