Thats it. Otherwise, functionality is the same.
I'm just happy to see more alternatives in the design tools space and to see them thriving. Sketch, Figma, Affinity Designer are all some of the vector alternatives doing well. Affinity works on both Windows and Mac. They have a Photoshop alternative in their Photo app and soon a potential InDesign rival in their Publisher app.
It's smooth in the browser, although we use the desktop version which runs remarkably well on Electron. Files auto-save instantly and you can do all of the fancy animations and effects that Sketch offers.
The killer feature for us is inviting clients or other designers into the document whilst editing it in real-time like Google Docs. Clients can lock themselves to your viewport so you can talk them through the design (huge win for me, the clients love it), or they can browse around freely and edit the document if you allow them.
Figma should have more market share IMO.
If you do an online search for "Sketch vs Figma" (or on YouTube) you'll find dozens of comparisons. Figma is browser-based which is a turn-off for many people (including me). However, sceptical reviewers have been won over by its features and the UI. So in the design tools space, they are definitely one to keep an eye on.
But I'm odd—before Sketch, I used Antetype. I really miss the unique layout engine of that one, but the app fell into neglect and started lagging behind the competition in many aspects.
Edit: As it turns out, Antetype might be revived! [1]
What's wrong with it?
It isn't just Sketch, there are a whole bunch of developers nipping away at their heels. Many of them offer quality products that are good enough, especially for new users.
I wouldn't bet on Adobe looking anything like it does now in ten or fifteen years time.