And if it's not cryptic icons it's undiscoverable actions or swipes... How come all the lessons of UI design that were known in the 90s got so completely forgot

And if it's not cryptic icons it's undiscoverable actions or swipes... How come all the lessons of UI design that were known in the 90s got so completely forgotten? I wonder how the standard is at these sort of software shops. If the SV dev/designer can navigate through the app then it's good to go? I don't know...