Sarang: Look even EGS could be a legitimate competitor but I agree with what Gabe says about piracy and it being a service problem. EGS made no active effort to be a true competitor, they just threw money at the problem by giving away free games and having exclusives but not ones that they paid to have developed so they are new games that wouldn't exist. There were existing games and Epic offered to wave the Unreal Engine fee if EGS got timed exclusives.
They never fixed all the flaws people talked about EGS having in the meantime versus Steam.
Steam is a superior product to EGS and I think many here will agree with me there much as we may not like Steam.
I legitimately think others could slowly and surely chip away at Steam's lead IF it was competitive featurewise. I think having the free games and if they drastically improved the feature set to be comparable to Steam, especially with the reduced percentage take on sales versus Steam, they would have definitely grabbed a percentage away, this is on Epic for not doing a good enough job improving it.
I assume this is about the lawsuit? And that you mean the one in the Western District of Washington? (There are others. For example, there is also litigation against Valve in the UK, but that is not as well known.) If so, then all of this is actually somewhat beside the point. The US case is not based simply on the argument that "Steam is a monopoly, therefore Steam is illegal".
What the specifically case challenges is Valve's price-parity requirement. Valve take a 30% commission on Steam sales, and the plaintiffs argue that Valve used its market power to prevent developers and publishers from selling their games more cheaply on competing stores. The argument is essentially that if another store charges a lower cut, a publisher should theoretically be able to sell the game more cheaply there. But if Valve can effectively require price parity across competing stores, then those competing stores can not use their lower commissions to compete with Steam by offering consumers lower prices. The argument is that Valve is able to impose this because of Steam's monopoly power, and that the result is reduced price competition across the PC games market.
And, just to be clear, this is not a frivolous lawsuit. The case has already survived attempts to dismiss it, and the court has certified a publisher class. This does not mean Valve has been found liable, it has not, nor does it mean the plaintiffs will ultimately win. What it means is that the case has passed the first test, and it is set for a trial. The date is not set yet, either later this year or in the next year.