It’s not that it’s to much effort to open a webpage. But it does make a real difference being able to switch back to an app directly instead of going to the browser, then the right window (if it’s not minimised), then the right tab. Even if you keep a separate window with your most common used web apps it inevitably gets filled with new tabs from links you click in other apps. I recently switched to all native apps where before I had almost everything web apps. And it’s a godsend to just cmd-tab to mail or chat and back to what I was working on the browser.