Wow, ok. This blog does not indicate any reason for it’s decline. I guess, someday for some reason Steam will be abandoned, nothing lasts forever. But the criticisms it does bring is

• steam got sued by Australia in 2014 because they did not offer refunds. Except neither did anyone else.
• Steam takes 30% of the profit. Yet the author even agreed that the competitor Epic games Store does not offer as good a shopping experience, does not have the player base, and the author does not mention all the other amenities valves offers.
• epic games store reports they do not make a profit at 12% and failed to mention that a lot of the disdain of EGS is how they treated customers
• the author states that steam market dominance is a monopoly. That game makers are FORCED to use steam due to steam holding its customer reach behind its service. Which is a terrible take. These game makers could publish on their own! They could publish on GOG or EGS. Gamers are free to choose their platform and so is game makers, and the fact that steams platform is so good its become the defacto PC game launcher, is a value to those shopping for a launcher. I literally bought some games outside of steam because they launched independently.