Many of the midrange minies like the PDP-11, perq, and a host of others
can and did do much of the web thing. much of the old machines don't do
that was not a matter of speed or memory but software conceived to do that.
is it practical not finance wise the user population is too small and would
not pay much but the hardware can make a good account of itself.
Keep in mind most of the PCs have only gotten to or exceeded the
minicomputer performance level say in the last 7 years maybe less.
Before then people used all manner of things to accomplish was PCs
are commonly used for.
Allison