The biggest issue with losing Twitter is losing the ease of getting support from companies. As Twitter was a public forum, many companies with otherwise poor customer service were proactive in addressing issues via Twitter. Internet outage? You could wait on hold for 2+ hours or you could tweet your ISP and get support in minutes. Bad service at a restaurant or a product broke? Tweet it.

Twitter was great at centralizing support, and that feature will be missed.

@cprovias True! One of my co-workers actually used Twitter as a way to report issues. It gets it better visibility too as others who were having the same issues would retweet it.