I think your arguments are invalid or enterprise would be pushing sata vs sas in configurations > 4 drives.Well i don't disagree, i'm just doing home stuff here. Again, second hand SAS drives used to be available alot cheaper than SATA drives per terabyte, and that was a huge incentive to get a SAS controller. Lately looking at the fleabay markets, that advantage is pretty much gone here in europe. I rest my case, have no arguments.
edit: there could be an argument that running SATA drives over pcie lanes is no less 'professional', infact, it's less complicated and removes complications like bad and/or corrupted SAS controllers, expensive and possibly bad cables, plus the extra conversion between standards. SAS used to be faster and more reliable, now it's no faster at all, and the physical drives are mostly all the same just with different PCB's (nearline sas essentially).
but i digress, your arguments are just as valid.
edit2: another issue is the ridiculous SAS cables, which requires A SATA power connector on top of the SAS connector. In many instances where the case isn't designed for that it makes for a flimsy connection that protrudes alot further out from the drive, in some cases like mine, i had issues getting the side cover on my tower case to fit because the connector was so bulky.
edit3: seems like i did have arguments after all