Erlich administers the Hacker Hostel, a tech incubator where Richard, Big Head, Dinesh, and Gilfoyle live and work in exchange for 10 percent of their potential businesses. Erlich clings to his glory days, when he sold aviation start-up Aviato, a move that, at least in his mind, qualifies him to be a svengali lording over other tech nerds. He still drives a car emblazoned with multiple Aviato logos and smokes copious amounts of weed.[1]
In Fiduciary Duties, a drunk Richard makes Erlich a Pied Piper board member, a decision he later regrets, only to later see Erlich's value to the company and re-offer him a seat on the board.
In Two Days of the Condor, it is revealed that Erlich no longer codes due to carpal tunnel syndrome.
In the 4th season finale he is left by Gavin in China and is never seen again. He is declared legally dead, and is possibly being held against his will by the man Gavin paid.