I'm surprised you don't list Sentry as a competitor. How do you compare? (We're a fairly happy customer of Sentry, but am always curious to see new entrants in this space)
And lastly, we prefer to keep our product simple and very opinionated. Most of our customers are using common frameworks and we're specifically focused on web. Long term, we see ourselves going in the direction of Datadog, building out a metrics and tracing product over the next 6 months or so.