On the fence users (using free accounts to trial Proton products & services) have more options in the pro-privacy e2ee market space now. Skiff for example already offers a free e2ee calendar with options to choose various colors. Proton needs to get smart and offer the same value at minimum. My bet is that many (millions maybe) people holding back from trialing proton because the feature set just doesn't measure up to Google calendar and now not even Skiff Calendar.. More color options in the free accounts will only increase your user base esp if you build out a task app that intergrates with your calendar too.. otherwise Proton will be left behind very soon by increasing competition in the e2ee space !