How weird: I was browsing YouTube last night (with the SmartTube app) and somehow stumbled on a video that discussed this exact thing, basically making the case that Wolfenstein 3D killed the Amiga and discussing how the unique video capabilities it had which were great for 2D side-scrollers made it so difficult to make a FPS shooter work well on it, because apparently the Amiga didn't have direct framebuffer access the way PCs did with VGA mode 0x13.
Edit: I just recalled something - the Amiga recquired either a TV or increasingly rare monitors with PAL/NTSC frequencies. You couldn't just walk in to a computer shop and buy an Amiga and a VGA compatible monitor. It was a flickery and low-resolution monitor or a TV. Not exactly endearing to professionals. I mean, I loved the Amiga maybe too much, it was always the underdog, but it was increasingly also the losing underdog.
I posit though, that by the time Amiga 1200 was out, Amiga as a commercial venture was already dead in the water. The 1200 was a last ditch effort. Still loved it, of course.
Yup, pretty desperate.