fmt:

• Allows positional arguments to ease translation (e.g. the string format("Do {0} to {1}", thing1, thing2) could be "translated" as "Do {1} to {0}", to allow different ordering in the sentance
• Currently in the draft c++20 standard, so pretty likely to be in standard libs soon (fewer dependencies and wider use and programmer exposure is good)
• Faster compile times
• Fast run times

compared to tinyformat.