Contrary to what you might have learned on hackernews, monopoly doesn't mean there is no alternative and having no alternatives is not the primary downside to monopolies.

> United States v. Grinnell Corp., 384 U.S. 563 (1966) Grinnell made plumbing supplies and fire sprinklers, and with affiliates had 87% of the central station protective service market. From this predominant share there was no doubt of monopoly power.