Most commercial UPSs come with a warranty that garuantees no damage to connected equipment up to a certain value. They also will use automatic voltage correction when the input sags or surges.
I’m not sure if any portable battery bank manufactuers actually cover equipment loss.
You also have to consider that many of the portable power packs on the market may not hold up too well to 24/7 operation. Quite a few of them are designed to be used a few days at a time, and then put back into storage.
Recently, I’ve noticed a trend of people adapting solar equipment into their home labs. I personally have been looking into building a DIY battery pack with an inverter and charger from Victron.
The total cost may be higher than an all-in-one power station, but they’re normally fire rated for indoor use, and tend to be rated for continuous operation.
Also, if you use a good combined inverter & charger, it can be programmed to act either as a line-interactive UPS, or a double-conversion system. Most UPSs avaiable are only line-interactive, and the ones that are double-conversion are quite pricey IIRC.
Here’s an older discussion from a couple years ago about this: