Not at all, and as I said, I preferred them.
They also offer the flexibility to expand and contract the size of a school as needed.
Yes, and my Louisiana land-grant college probably deeply appreciated the fact that they could get them bon marche', too -- they got some of those buildings, or so I heard, from some World War II military installations in the area and had them hauled in and reassembled quickly and cheaply. I'd say the taxpayers really got their money's worth!