I still use Fireworks CS6 for one-off mockups. I don't specialize in design myself, but I think that's exactly why I like using it - its UI is intuitive and simple. I've tried newer/maintained vector editors like Inkscape and Krita, and still feel like there's a void left by Fireworks for casual users like myself.
I thought I was one of the last Fireworks users and I gave it up a few years ago in favor of Sketch!
Once I learn a tool well enough to suit my needs, I really hate giving it up so it was a difficult transition. Probably why I never bothered abandoning Sketch in favor of Figma.
I've used all of these tools as well. Recently I was clinging to the side of Sketch with white knuckles while bringing over stuff from photoshop and illustrator and exporting to zeplin. The process was cumbersome but created excellent results. But I finally forced myself to check out figma.
Within about two weeks I never looked back.
For me, figma was just SO much better. Some of the behaviors are so head-smackingly, "Oh my god, why doesn't Illustrator do that?!" it's nuts.
I still need PS and Illustrator on occasion, but for embracing Figma I was able to dump 2 programs (Sketch/Zeplin) and actually improve my company's overall design consistency and brand like never before. And I use the Adobe products - which I've used for over 30 years - so much less, it's stunning.
I must sound like an advertisement, but figma has been a total life/career-changer. The news of the acquisition this morning slapped me hard. I fear the unknown. I remember what happened to Macromedia, too.
Sketch is ideal Fireworks replacement. I clinged to Fireworks for years after it was abandoned, and when I found Sketch, I never looked back. Every little thing that ever bothered me in Fireworks, they made just right.
I'm in exactly the same boat. It's such a shame that AFAIK nothing can import .fw.png files and keep them editable; I'll need to manually export everything to .psd before I eventually have to upgrade my OS.
Same boat. Wondering what it takes to either VM Mojave or get a windows license and VM that. And this whole episode has made me definitely appreciate the merits of Windows backward compatibility as a feature...
I still use it as my primary web/ui design tool and in fact am stuck on MacOS Mojave because I'd have to say goodbye to it forever if I upgraded.