I have just read an interesting blog about micro-contrast /ref: this site/.
Since I have a Fuji X-T1 and since I do not have a Mac, this sentence puzzled me:
Fuji XF lenses all have good to great micro-contrast like Nikkor lenses but they require the use of Iridient Developer (Mac OS only) to reveal their true nature.
Why Iridient? Why cannot their true nature be revealed in RT? What features does Iridient have that are not available to RT users?
Sincerely,
Claes
In comparison with Adobe, in particular, the “standard”.
Different programs have different demosaicing methods, and the difference is only generally well-known for X-Trans users, since Adobe initially had a particularly bad implementation, which has since improved somewhat.
I don’t know how RT compares to Irident, but as far as I know it’s generally considered better than Adobe.
The author of that site believes that modern lenses are evil and create flat noses and that glass acts like a capacitor for light. So take those statements with a pinch of salt. 
Edit:
Sigma ART lenses do not have micro-contrast at all.
lol.
There are many ways to increase microcontrast in RT. I have an X-T1 too, it’s been discussed to death on forums such as DPReview, and I can say that RT is on par with the best commercial raw developers, and you have to be a pixel peeper to find any slight difference.