Having lots of EXTs, including those that require their own PSUs plus paying more vs internal HDD prices is not convenient
I honestly don't know a single PC user who would rather have an EXT over an INT. The only reason I'd want EXT is for portability. Even then I'd hack one together myself rather than pay ridiculous prices
The PS3 started out with a lot of EXT storage options but they removed them for cost cutting. I'm guessing they seen the stats and saw people only cared about the internal HDD.
Huh? I'm not sure why you think external drives are not popular, but I think your missing the data on this one. External hard drives sell very very well. Most people wont replace their own drives, they just don't want to. So they either have it done, or they go out and buy a single external. You make it sound like they have this box full of externals laying around
Its not about having lots of externals, its about have the choice of mobility for your data and being able to access more storage than the internal option provides. You mentioned cost, but if you actually followed pricing, you can actually get external drives that cost less than the internal counter parts, especially in the 3TB+ range. Plus, as you said, you can put your own together if you find an internal for cheaper. That's what I want to do. I'm wondering why you want to argue the convenience value of external devices, it seems kind of obvious to me.
If you had read the rest of this thread, you would see my points laid out on the advantages, so feel free to read those. Basically, having the option to offload everything to an external drive has many advantages, it also has disadvantages. Its a nice option to have, I'm not sure why you want to downplay it. This isn't about internal vs external, so I'm not attacking the use of an internal drive.
As far as the ps3 supporting external features, I think its a fairly lame excuse to blame it on 'cost cutting'. I know they cut out things to cut costs, but how was supporting game installs on an external drive costing Sony money? Yeah, I don't think it was a cost cutting measure. Plus, if your going to assume that Sony looked at 'stats' and saw people only used an internal, then why don't we assume MS looked at the 'stats' and saw that people only cared about using an external. My point is, arguing over what these guys were thinking is a bit silly when we have nothing to back it up.