I'm surprised no one commented on this yet...
DSLRs and MILCs are
both in trouble with sales down from last year. For over a year now, the percentage of sales has been holding steadily with DLSRs at about 60-65% of the interchangeable cameras market, and MILCs at about 35-40%... except this month, DSLRs are 70% and MILCs are at 30%, probably due to a big shipment of entry-level cameras from Canon. The average should stay around 65-35 in the months to come.
So, the market share seems to be stuck at 65-35 (60-40 in the asian markets), though the new MILCs from Canon and Nikon that are rumored to be launched this year could obviously change that.
The other interesting thing is that the MILC cost per unit has been steadily increasing and the gap to the DSLR per unit cost, which has been lower now for a while, is widening.
My conclusion: It looks like the DSLR still has a lot of life in it... but the ILC camera market could really suffer now in the era of the two-lens cell phones. ILCs are becoming more and more of a specialty tool, and as a niche market I'm sure they will remain - I can't see any wedding photogs or sports photogs or bird enthusiasts doing their jobs on cell phones in the near future...
See
February 2018 CIPA Results and Analysis | Canon News