I highly recommend using whatever capabilities are convenient of any utility you're running, and not caring about what other systems do unless you're actually trying to write a portable shell script.

In a world with nix and where nearly every system has zsh, restricting yourself to the POSIX version of these tools is masochistic.

BSD vs linux with a standards committee inbetween.

the example as given does not accumulate, so that is what i worked with.

    find -exec command '{}' '+' 

accumulates file arguments too. the only advantage of xargs is that you can tell it how many arguments to accumulate,̶ ̶t̶h̶e̶ ̶d̶o̶w̶n̶s̶i̶d̶e̶ ̶o̶f̶ ̶x̶a̶r̶g̶s̶ ̶i̶s̶ ̶t̶h̶a̶t̶ ̶y̶o̶u̶ ̶h̶a̶v̶e̶ ̶t̶o̶ ̶s̶p̶e̶c̶i̶f̶y̶ ̶t̶h̶e̶ ̶n̶u̶m̶b̶e̶r̶,̶ ̶w̶h̶e̶r̶e̶a̶s̶ ̶f̶i̶n̶d̶ ̶j̶u̶s̶t̶ ̶f̶i̶t̶s̶ ̶a̶s̶ ̶m̶a̶n̶y̶ ̶a̶s̶ ̶i̶t̶ ̶c̶a̶n̶.̶

The prior has a point because 98.89% of the time I type xargs -n 1 -0 and we are deep in the useless pipe argument which Rob Pike amongst others has rehearsed well.

I do it because I do it, just like why I use egrep and sed in pipes along with awk.