Curious questions, Ieva 🙂
How many of answered ppl were only icon designers or how many were interface/web designers, that make icons as side element?
I think Adobe still the best for icon design tool. Sketch and Figma are good for interface/web and clumsy when it comes to vector complex art.
I remember there were even some issues on Sketch with exporting icons to SVG (it was creating some unneeded masks on simple shapes), but it is great tool for having library of icons inside project, and use them through various interface screens. And those 2 are free or cheaper than AI, and evolving all the time.