I maintain a codebase that I’ve migrated from C++98 to C++11 and all the way to C++23 and even a bit of draft 26 (the latter for some minor library improvements). Few things made me quite as happy as moving from using SFINAE to using requires clauses and concepts.
(IMO the single best improvements over the years have been atomics and maybe variadic templates.)
(IMO the single best improvements over the years have been atomics and maybe variadic templates.)