Do I (should I) need Logi Options+?

I have a Logitech MX Keys S and MX Master 3S setup, but do I need Logi Options+ installed? I know I configured some stuff, but I'm not sure how much of it was even necessary? Things that stand out to me so far: - App-specific mouse button control.... don't think I need this/am okay without it - Flow - will not use Are there other things I clearly miss out on without Logi Options+? Basically: Installed or not?