Interestingly, I met a young dude (well, his hairstyle is very much that of a young dude) yesterday who is the boyfriend of a young singer I have recorded with. He has recently finished a photography course at uni where they had to learn all the known technologies. He currently has a job photographing stage productions, some quite major and his girlfriend is a drama student at the famous Italia Conti.
I asked him what his favourite camera type was. Without any hesitation whatsoever he said "DSLR" and briefly explained why.
You have only to ask yourself why outdoor professionals use DSLR rather than other systems. Studio photography is a different ball game of course, except perhaps fashion.
As always, it's horses-for-courses and I hope that ALL systems may continue to live on, including smartphones and their future equivalents. DSLR technology isn't standing still anyway!