[a_t48]

The last three generally shouldn't be used (`+` is sometimes fine, but not really for formatting), but I doubt we would ever get a py4 that removes them, given the stomachaches that py3 caused. It does feel odd that a t-string is just an f-string without args applied.

[alfalfasprout]

It's my understanding that they're still recommended for logging since with f-strings you always pay the formatting cost (but with str.format it's deferred).