I'm absolutely happy people are taking on Illustrator/XD. I was a freelance illustrator specializing in print while in college, and have grown dislike Illustrator.
The issues I'm having now with most design and vector art tools now are:
* No Offline Support * No Linux Support.
That leaves us with... well, just Inkscape. Honestly it has gotten decent with the most recent version. We finally have an objects menu, after 5 years of development. But features are still behind Sketch, AI, and Affinity.
I'm well aware Linux users who are into drawing or design are a small minority, so I can't really complain.