robklurfield
eclipse
makes sense. well put.
This for example: with a couple of friends recently, indoors, cozy but very dim lighting, EV 4 @ ISO 400 according to incident metering with Gossen Digisix. I had HP5+ in my M2 and a M-Rokkor 40 f2. So, I underexposed and took pictures mostly at f2 and 1/15th. (That's underexposing at 2 stops). I "pushed" to film a bit when developing, negs look usable. But: lots of motion blur from the friends just talking, moving etc. A number of pictures where more DOF would have been great, but it simply wasn't an option.
So, let's see what 12800 ISO could have done in this situation: that would have given me a comfortable f 2.8 @1/60th. You can quickly see that even ISO 12800 just gives you comfortable, but not luxurious DOF-choices. It doesn't take "shooting inside black holes" scenarios but very mundane photo occasions to see that higher and higher ISOs simply give more choice to any photographer.
I take pictures for my personal enjoyment, and while I follow the advancement of digital photography with great interest, I so love having a negative and using a camera that is almost 50 years old, that I am not tempted to buy a digital camera for myself. But I am in awe of the possibilities that have opened up.
That said, I still (for totally subjective and personal and emotional reasons that make "sense" to me 🙂) sympathize with what some guy once wrote on Pnet (quoting from memory): Hell yes, I'll go digital the day I can soup my SD-card in ID11 1+1! (Make that HC-110 Dil. B for me 🙂)