> byoyomi has all but been replaced by Canadian Overtime

Note that this is from 1997. It was common to use clocks in Europe that were unable to do proper Japanese style byoyomi and we did not have one timekeeper per board in tournaments. When I run out of time we paused the clock, I put for example 15 stones in front of me, closed the stone box, set my the clock for example to 10 minutes and start playing again. I would lose if I ended the time again with any stone left in front of me.

Clocks that could do byoyomi, and multiple rounds of it, started to be widespread not much after those years. I think we used them in the European Championship of 1996. A common byoyomi was 30 seconds per move. If I had one euro per each time I heard a clock saying "30 seconds one time" I'd be rich.