It’s no slouch, it’s sharper at F2 than the original X100 lens and the XF23mm F2.
As
@trevorbray says the newer WR F1.4 is probably slightly ahead but the revised X100 version (V/VI) is also excellent but not at F1.4!!!
IMO there are some good third party options but none of them are as good as the Fuji’s once you take everything into account (but they are cheaper).
I liked the original 23mmF1.4 on the X-T2, the balance was good and I felt I got decent results, but if it was a one camera solution I would personally go for the X100V over and X-T2/3+XF23mmF1.4 - but then you’ve already been there