[blub]

Not a nitpick, but a well deserved criticism. When buying anything from Steam, the customer is at the mercy of a cloud service, since the offline mode deactivates itself after a certain time, or randomly.

Steam have banned customers and took away access to their paid games library for petty reasons and were sued into accepting refunds.

gog.com is an alternative where one doesn't depend on the goodwill of any company. If you have the setup files and they work once, they will continue to work, at least when the OS vendor pulls an Apple.