> Arguably every election that brings in a new government is a reboot. A revolution is more like wiping the drive and installing a new OS.

In the UK, Governments change but Parliament persists. The basics mechanism of state are unchanged until a new Govt defines and votes through new policies. Unlike the US, the UK's civil service doesn't substantially change as a result of an election.

The last really significant change to Parliament was perhaps the 1832 reform act which got of rotten boroughs - constituencies with few if any voters that still returned MPs. Since then the House of Commons has gained primary over the House of Lords, whose main role now is delaying/modifying Govt proposals. The last big reboot was the Restoration.

I'd say it's more like an upgrade. The release notes promise all sorts of improvements, but they often bring new bugs.

A revolution is more like wiping the drive and installing a new OS - from a backup that still contains malware from the previous revolution.