Ah, your last sentance is exactly the type of bullcrap that Sony folks always say. "Canon had to be brought kicking and screaming..." You have no idea when Canon started doing R&D into mirrorless. No idea. The M series launched in 2012, I believe. Their FF ILCs followed Nikon by a couple months maybe?
In fact, for the leader in a market it's a
disadvantage to pursue the bleeding edge with commercial launches, but an advantage for R&D to keep pace with that bleeding edge. It seems that's exactly what Canon did – their APS-C MILC line was ready to launch once APS-C MILCs represented a substantial (but still minority) fraction of the market, and within 5 years of launch their APS-C MILC line became the global best seller. When Canon and Nikon launched FF MILCs, DLSRs still outsold MILCs that year and the next.
The fact that Canon has navigated the dramatic drop in DSLR sales and the relative shift of the market to MILC, while maintaining their overall market dominance and becoming first the #1 brand in APS-C MILCs and now the #1 brand in MILCs overall just shows their strategy was the right one, for them. For a company like Sony, that was not the market leader but a distant 3rd, the same strategy would not be optimal, and the fact that Sony is now a solid #2 shows that their strategy was also the right one, for them. Nikon, OTOH...

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