A digital camera doesn’t need a prism…anymore. When DSLRs first came to market two decades ago, they didn’t do video. Even if they did, the batteries at the time wouldn’t have held up for long shoots for weddings, sporting events, etc if they were showing video in the screen.

As the article states, the move to mirrorless cameras is now pretty much a given. Canon announced their latest DSLR will be the last.