My mate has a serious 80 character OCD some C++ function calls take up 20 lines and he got a 4k monitor but a C64 mindset lol
The only time I miss this feature is when defining long strings, shaders and such, myVar+ functionality would alleviate some of the need for new line concatenation but not all of it.
It could probably help to add that we only need concatenation inside function calls and literal strings, maybe arrays too, there is already a check in place in the compiler that looks for a close character to any open character used so catching a CR/LF/CRLF actually already happens it just needs its own case to grab the text from the next line and incorporate it into the current context until a close character is found or any other error it already checks for, rather than rewriting the entire parser to support concatenation.