https://www.techradar.com/news/nikon-z7-vs-canon-eos-r

Canon and Nikon were always somewhat reluctant to join the full-frame mirrorless party, and their respective EOS M and 1 systems never quite made the same dent in the market as their rivals. 

It’s all change this year, however, as both companies have caved into the massive demand for full-frame alternatives to their DSLR lines, with Canon releasing the EOS R and Nikon kicking off its Z system with the Z6 and Z7.