It doesn’t surprise me. TipTap looks really good and solid. 
On a side note, I noticed that TipTap is actually a wrapper around ProseMirror.
Tiptap is a headless wrapper around ProseMirror – a toolkit for building rich text WYSIWYG editors, which is already in use at many well-known companies such as New York Times, The Guardian or Atlassian.
Create exactly the rich text editor you want out of customizable building blocks. Tiptap comes with sensible defaults, a lot of extensions and a friendly API to customize every aspect. It’s backed by a welcoming community, open source, and free.
I will give it a try later. It sounds really interesting. I have yet to see if the TipTap API, which I assume makes the ProseMirror API usage easier, can bring all the power ProseMirror offers.
EDIT: Actually I should read the topic, it has been already pointed out multiple times above 