What feature XD give you that not available on Sketch and Figma?
What's also nice is that you can create color themes in their Color/Kuler web app and then have those themes available to pick from within XD, or that you can open and work on images and scenes in Photoshop or Dimension (their V-Ray based 3D app which is cool for Hero scenes).
Best use both, Figma is better for web apps (XD doesn't even have inset shadows for forms), and XD is a bit better for landing and marketing pages, especially if you use their other tools.
We're also hopeful browsers will expose an API for accessing a list of local fonts / font metrics with the user's permission. (It's a fingerprinting issue to expose this info without the user opting in which is why browsers haven't built something like this in past.) This is gaining traction on the Chrome team, which is really exciting! https://bugs.chromium.org/p/chromium/issues/detail?id=535764...
https://help.figma.com/hc/en-us/articles/360039956894-Use-Lo...
https://help.figma.com/hc/en-us/articles/360039956774-Manage...
Have you thought about integrations with popular (among typographers) services like Fontstand, or smaller ones like Fontown? This could be a gamer changer. I really want Figma to become a real alternative to Adobe, not only for UI stuff!
Adobe's font control is simply dystopian. Many hours wasted debugging why a font was having issues _only_ in Adobe products, but not in other software (like Word).
I found Figma quite well-engineered, though I’ve only used it in its website incarnation.