If we’re specifically asking whether or not a power station is a worthwhile investment for exclusively charging up power tools, then the answer is “not really.” While supercharging multiple battery packs at once sounds really convenient, you could accomplish that same goal with a handful of standalone battery chargers for substantially less money. If you’re only using one tool at a time, you could just have one battery pack charging in its cradle while you use another pack, then swap them when the latter runs empty.
Perhaps the only circumstance where a power station would be good for handiwork would be in the midst of an active worksite, where there are few active outlets, and it’s not safe to wander around in search of a fresh battery pack. In this hyper-specific circumstance, a power station keeping your batteries warm might be beneficial, but whether or not said hyper-specific circumstance would warrant a $1,000 investment is something you’d have to decide for yourself.