With Slack getting ready to go public this week, venture firm Accel is poised to rack up another big win. 2019 is proving to be a banner year for Accel, as its portfolio companies either go public or get acquired for big bucks. Accel is a classic, top-tier venture capitalist with a long history in Silicon Valley. Its ongoing success gives pause to this idea that the venture capital model is really being blown up, as is the trendy talk these days. Click here for more BI Prime stories.