> If you object to iostream on religious or stylistic grounds,

No I object to it on usability grounds. It took more than 30 years for the committee to admit it but C++ now has typesafe std::print/std::format finally, after admonishing programmers for using `printf` in C.

C++ only acquired the capabilities to have a statically type safe format string only recently.

Iostreams have a lot of issues, but overloading<< is a very minor one.

But it is achievable without operator overloading, isn't it? There is also a reason why format strings seem to be more popular among the crowd.

Streams have numerous design problems (e.g. representation is managed by the stream, not the thing you’re printing) making the shift operator syntax the least of the problems.

Which part of operator<< involves continuations, let alone continuation passing monads?