That's because most people are not willing to migrate their macros and some formulas from excel (lazy fucks that they are). It's doable, I've done it, did it years ago, and now build new ones for libre office all the time.
I have never had to rely on, or even use, microshit's software since then, haven't had anything not work for me. Being the imbecile that I am at those things and having managed to make them work, it's just a matter of choosing to do it, which most people choose not to.