But now Adobe is actively working on a proper cross-platform Sketch competitor (and lookalike?), after years of absence: Adobe XD. This means that, unless you have an Apple machine, you are left out.
If you do your work on a PC, you are probably haunted by the constant mention of Sketch, a popular, streamlined vector graphics editor with countless useful plugins that is quickly becoming an industry standard- but only available on Mac OS. A UX designer needs many tools to complete the many stages of the UX workflow from research to design to prototype and handoff.