There is nothing to keep you from using factors of 1024 (except he slightly ludicrous prefix "kibi" and "mebi"), but other than low level stuff like disc sectors or bios where you might want to use bit logic instead of division it's rather rare. I too started in the time when division op was more costly than bit level logic.
I'd argue that any user facing applications are better off with base 1000, except by convention. Like a majority of users don't know or care or need to care what bits or bytes do. It's programmers that like the beauty of the bit logic, not users. @mb_