You could pass through anything as long as you’re willing to destroy it in the process
If you work in demolition you could take out a wall by continuously teleporting through it, if you wanted to do typical superhero stuff it would be good in a fight but nonlethal attacks aren’t really an option
Being able to teleport into a region already containing air without creating a nuclear blast requires that you can already either instantly displace the air in the target region (which would make a Very Loud Noise) or switch places with it, so there are possible interpretations of the power where teleporting into a fence would leave behind a detached section of fence or bend it out of your way
NixOS has the potential to do really well here. The Nix language has a rich enough type system to generate GUI forms for every field, and there are several projects being worked on that allow editing NixOS options from a GUI. They’re still very janky, but it’s definitely possible to get to a point where a layperson could operate them without breaking their system.
silly idea: have a microwave on site, put players’ glasses in there for a few seconds to nuke any sensitive electronics inside without causing damage to metal structural elements
You would still need to be able to displace suspended particles, bacteria, and small insects, otherwise you wouldn’t be able to teleport outside of a clean room