The microkernel would like a word with you, good sir. As would the Unix toolchain, the Google suite, iWork, and Microsoft Office. If it was modular, you wouldn’t need separate apps per se.

On the other side of the multiple app token, Microsoft doesn’t build out PowerPoint, Word, and Excel as a single monolithic Office app.

And I’m pretty sure that’s among the most commercially successful consumer software in the history of computing.