Spike protections is still a usefull thing to add and the easiest way is a plug in unit at the outlets. Get one with about 500 to 800 joules capability to absorb "Spikes"
Spikes that are near zero (500 to 800 joules) are routinely absorbed by electronics; converted to low voltage DC to power its semiconductors. Protectors rates that tiny also have a history of creating fires. Fortunately, these undersized protectors have a thermal fuse to disconnect protector parts from larger surges; and leave that surge connected to attached electronics. Then attached electronics make that surge irrelevant.
Then wild speculation says, "My protector sacrificed itself to save my appliance." Nonsense. Appliance protected itself from a surge so tiny as to only destroy a grossly undersized protector (500 - 800 joules).
Effective surge protection must be located elsewhere so that even destructive surges - hundreds of thosuands of joules - cause no damage. No damage even to the protector. These proven devices typically cost about $1 per protected appliance. And are the only solutoin always found in facilities that cannot have damage even from direct lightning strikes. Those facilities do not spend tens or 100 times more money on plug-in protectors.
As noted previously, protection means direct lightning strikes without damage. If a refrigerator needs that protection, then so does a dishwasher, all clocks, TV, air conditioner, and most important smoke detectors. Only a 'whole house' solution provides effective protection. Necessary to even protect that near zero (500 to 800 joule) plug-in protector.
This is irrelevant to a completely different topic about blackouts and low voltage - that can harm motorized appliances and are of no concern to electronic hardware.