It was good in 4x5 if you wanted to enlarge to several feet on a side and not see grain from close viewing.
It's main claim to fame was having such fine grain a 35mm negative, if shot very carefully with superb glass, could produce a print to rival one from 4x5 on conventional film. Maybe larger formats becoming more affordable as digital became more popular helped do it in.
I never cared for it. Weird spectral response, special developer needed, and painfully slow. If I could tolerate the speed I'd rather have used APX 25 which was quite fine grained enough for me. But some people did love it, true enough.