It's slightly more nuanced than you're making it sound. For one thing, Twitter may very well be more reliable than your email system (YMMV). For another, email

It's slightly more nuanced than you're making it sound. For one thing, Twitter may very well be more reliable than your email system (YMMV). For another, email doesn't generally beep loudly and alert you. The idea that an additional part automatically weakens a system is reductive. It doesn't necessarily weaken it at all.