A hypothetical Datacenter version might have skipped the optical drive, perhaps cutting down on their losses. At launch I doubt they would have had enough spare processors to build them without cutting into their PS3 production capacity.
Additionally many game studios reported difficulty in writing for the PS3's processor compared to the Xbox, which had gone with a processor pretty similar to most PCs at the time. So by the time they had ramped up the capacity to make enough to meet PS3 demand, there were several years of worse/less performant PS3 versions of games developed for multiple platforms, making Sony's console look worse. It would have been a tough sell internally for the PS4 to use a custom processor architecture again, so they opted not to. This must have soured Sony's opinion of the Cell processor overall.
Cell used the PowerPC isa as did the Xbox 360. Both were designed in the same IBM facility but separated by a floor. IIRC the Xbox team indirectly learned from the Cell team's mistakes at the process/microarch level.
Cell was definitely more weird to code against and Sony put max theoretical perf above Xbox's approach to be more general purpose chip architecture.
So strictly speaking it wasn't like most PCs at the time in the x86 sense but in the three mostly same cores for Xbox vs custom Cell and special ways to squeeze out performance.
There's a book about the development of both of them, The Race for a New Game Machine: Creating the Chips Inside the XBox 360 and the Playstation 3 by
David Shippy & Mickie Phipps. [0]
It has some details on the awkward position the IBM developers were put in.
Rodrigo Copetti's excellent articles on the PS3[1] and Xbox 360 [2]
and Ars' Hannibal's article on the Xenon Chip. [3]
Sort of. The xenon cores are pretty damn close to cell PPE cores, just with VMX-128 strapped to them. They even share some taped out blocks, and have almost all of the same microarchitectural issues like the load hit store penalty.
Sony should have realized that the Cell/Power was needed in great quantity, and insisted upon a second supplier. Motorola started making the PowerPC 601 in 1992, so a secondary foundry was absolutely available.
From the wiki: "The introductory design is fabricated using a 90 nm SOI process, with initial volume production slated for IBM's facility in East Fishkill, New York."
AMD did this for Intel up to the 286. Sony should have insisted upon a tidal wave of wafers, if needed.
Additionally many game studios reported difficulty in writing for the PS3's processor compared to the Xbox, which had gone with a processor pretty similar to most PCs at the time. So by the time they had ramped up the capacity to make enough to meet PS3 demand, there were several years of worse/less performant PS3 versions of games developed for multiple platforms, making Sony's console look worse. It would have been a tough sell internally for the PS4 to use a custom processor architecture again, so they opted not to. This must have soured Sony's opinion of the Cell processor overall.