Canon FD-mount existed from 1971 to 1990 - only 19 years
Canon R-mount (R+FL+FD) from 1959 to 1990: 31 years
Sony A-mount exists since 1985 and even if dies 2016: 31 years
IMO for most purposes EVF will be superior to OVF. Current disadvantages like display-lag will get smaller and smaller until it is negligible, the picture quality will raise, too.
Only one drawback...
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||May 24, 2013