Since 2012, through the eras of Photoshop, Sketch, InVision, XD, Figma, and whatever else, I've been using Antetype: https://www.antetype.com
For me, it's been a 10x tool since it was always the only piece of software that was designed from the ground up as a UI design tool, rather than being some other kind of app that was pressed into service for UI design. Auto-layout, responsiveness, and flexible components that can be edited per instance without breaking their link to the master component are all features that were present from day one rather than being awkwardly bolted on.
For me, it's been a 10x tool since it was always the only piece of software that was designed from the ground up as a UI design tool, rather than being some other kind of app that was pressed into service for UI design. Auto-layout, responsiveness, and flexible components that can be edited per instance without breaking their link to the master component are all features that were present from day one rather than being awkwardly bolted on.