People are going to continue to use DSLR's because of all the interchangeable-lenses that remain. The DSLR market is going to get smaller and smaller but it is not yet dead.
Ignore the half baked math and read what Canon is telling us:
for interchangeable-lens cameras we saw rapid contraction of the DSLR market due to the rise of smartphones, and the overall market shrank as sales of mirrorless cameras could not cover this drop
As for Imaging System, the contraction of the market for interchangeable-lens cameras, mainly for DSLRs, continued in step with the proliferation of smartphones, resulting in a significant decline in sales and profits
In the first quarter, sales of interchangeable-lens cameras were down 19% to 850 thousand units. This reflects the combined impact of accelerated market contraction for DSLRs,
As a result, the market for entry-level DSLRs is contracting at a pace that exceeds the outlook we had at the beginning of the year.
That said, we expect the user base of professionals and advanced-amateur, people who value the image quality and expressive possibilities afforded by cameras with large sensors and an abundance of interchangeable-lenses to remain. For the market overall, however, we expect the trend of market contraction to continue for some time.
Mirrorless cameras, known for being small and lightweight, are increasing their presence in the market. Amid this situation, we will steadily shift our focus from DSLR to mirrorless cameras with the aim of maintaining our overwhelming competitiveness, which we have built upon DSLRs.