I will go out on a limb here and put my 2 cents in.
I have been with xj/9e/EDV for over a quarter century.
Also a Long time LCP/LCA.
The current book on the 900 is to leave the switch in at all times. However that is because the current thinking is the thingamajob (GCU) will do it's job. We all know that on the CRJ (well most other heavily CPU intensive aircraft as well I assume) the thingamajob does not ALWAYS work. How many times have we done a power down to fix a issue caused when some other thingamajb did not work as advertised.
If a MX person with a lot of experience says the potential is there for a "jolt" because they have gotten one...I believe them regardless what the book says.
So we operate the plane as the current book say's however keep in mind the book changes over time.