We've just had a new kitchen put in with a brand new shiny stainless steel sink. After just a few days, the sink is scratched. I am reading conflicting things online - that it's impossible to keep the mirrored, shiny reflective surface on a brand new stainless steel sink and that you should expect scratching. Also reading that stainless steel sinks look better after a year or so when they have developed "patina".
On the other hand, there's advice about polishing out scratches. These aren't deep scratches. Just marks from cutlery being put in the basin.