I fail to see how the list you summarized indicates
the users are
scared. I agree some (no room for another machine) might not hold up
under severe scrutiny (Honey, no room for a PC/104 IBM, but I just took
deilvery of a PDP-11), but the others seem quite pragmatic.
You don't know how little space I've got left.....
Anyway, PDP11s are not hard to accomodate. The CPU is quite often a
single 10.5" (or even 5.25") rackmount box. That goes in a rack with
other stuff. And if there's no space in the rack, then it just sits on
top of something else. And something else goes on top. It's a nice,
cuboidal, module
The PC processor box is much the same, sure. But the monitor isn't.
Monitors don't often go in racks (Yes, rackmount ones do exist, but they
are not common or cheap). They are irregularly shaped boxes that don't
stack nicely.
For me to run a so-called modern PC, I would need a new monitor, and that
is something I certainly can't accomodate
-tony