Most of Wikipedia articles hardly change over time. The entry for potassium for example, or Smoot-Hawley Tariff Act. The controversial or recent current events topics get most updates.

Doesnt matter really if you have nothing at one point.

Any entry that is changing hourly (or even monthly) is probably not a topic you should be relying on an encyclopedia entry for anyway. Use the tool for what the tool is good for.

I used my old Grollier’s Multimedia Encyclopedia CD for years.