Home use not needed, leave it unplugged. All mine are.

I’ve heard some folks have had luck with recapping their reset boards when they start to get wacky, but YMMV.

As long as you’re around to reset the machine in case it locks up, you can probably keep it unplugged - mine stays unplugged.

These boards often need new electrolytic capacitors and a reflowing of solder joints.

^^^What Ken said^^^
Especially since the electrolytic caps on these boards are used in timing circuits, it doesn't take much of a change in capacitance to affect the reset timing. As these caps age, capacitance goes down; as capacitance goes down, the watch-dog timeout delays shorten; as the timeout delays shorten, the more often resets occur.

For a machine only on for short periods and while people are around, the reset board is not needed.
The one thing that these did add for reliability was a 3K pullup resistor to the Read/Write signal from the CPU. This pullup resistor was located on the DIP plug between pins 7 and 11. Most machines functioned properly without this added pullup resistor (and without the entire reset module as well), some machines refuse to operate properly without this pullup resistor.