I allowed for very expert systems, Virtual Sentients I named them, to replace crew. They were very good at doing their job, but had real limitations in other fields. Not the same as a real sentient, but a useful alternative when another set of hands were needed down in engineering.
This struck me as a bit of incite.
Both here, and on the damage control thread.
But, consider, something like a "mechanic" robot.
Now, taking this from the "mechanic" point of view, versus an "engineering" point of view.
From a mechanic point of view, the machine will work properly when assembled to spec using the proper parts and materials. It's not the mechanics job to solve engineering problems.
The benefit of a skilled mechanic, say from an automotive perspective, is that they can, via diagnostics, measurements and experience, efficiently determine the correct solution to a problem. This is important in order to avoid doing unnecessary work. Unnecessary work is expensive in terms of time. However, time is "expensive" for two reasons. One, is the loss of productive work from the machine. Machine isn't working, it's not doing it's job of production or whatever else the machine does. But also, the time is expensive because you have to pay the mechanic to do the work. There may also be the expense of additional parts (notably one-use things like solvents, cleaners, gaskets, etc.).
But when you take in to consideration a robot, it's "time" is not free, but it may well be cheaper than a humans time (which is kind of the whole point). The robot may also be more efficient.
This suggests that there could well be a benefit of a "less than brilliant" skilled robot who's last result diagnostic tool is to simply take apart, measure, and reassemble the faulty machine. Got a strange knock in the engine? Got something odd that happens off idle but only on on-ramps when the traffic control light goes green? Some other occasional, nagging problem that's difficult to diagnose? Rebuild it.
Tear it apart, laser measure all the pieces, replace the out of spec ones and bolt it back together.
Today, we avoid that because of the labor involved. Make that cheaper, and it becomes a more viable solution to strange problems. You don't want to rebuild the motor to replace a spark plug, but it makes "brilliant" mechanics less necessary for many applications.