While technically, Figma is just a web app tool. Replacing it would be hard. It has a ton of features, it’s well designed, it exports working wireframe mock ups you can use to demonstrate functionality. It’s good software.
I say that as someone who knows Photoshop/Illustrator for ~20 years, and Adobe did very little to improve it for almost two decades. It loses to any modern counterpart. Figma, Affinity Suite, Pixelmator Pro, they are much better. So, for me, the complexity of Adobe’s software is rather their sheer incompetence and lack of will to do things better. They think they’re too big to fail, but I hope they’ll just go bankrupt quickly. They deserve it.