[JRTJH]

According to the Keystone Owner's Manual (but who ever follows the manufacturer's recommendations?) the slide should be "exercised regularly".

The actual statement reads: "Rooms that will be extended for long periods of time should be actuated 1-2 times a week." It's on page 71 of the 2019 Owner's Manual.

Any time an electric motor sits "without use" corrosion can occur on the windings, in the bearings, on the contacts. Gears, when they sit "without use" will corrode and rust, possibly bind or fuse together. Rubber seals, when they aren't flexed, moved and/or cleaned, will "dry rot" and crack.

It's important to maintain your slide, IMHO, that includes activating the slide to keep rust, corrosion and dirt/contamination from working its way into the mechanism as well as to flex/exercise the slide rubber seals to keep them pliable and prevent them from sticking.

I'd strongly recommend following the manufacturer's advice.