Definitely! There’s an email sign up at the bottom of the page here https://repla.app/
The app is already available to download and try, with a couple of interesting use cases you can read about on the site. We're also shipping a Markdown preview that's in testing now shortly. The next plugins we're looking at after that are Mermaid (https://mermaid-js.github.io/mermaid/#/) and now Markmap too.
Every time I see something like this, my thought process is:
“Cool, that could be useful for X”
“Hmm X is proprietary. I’m not typing into some random website.”
“Can I run this locally?”
“Nope, not natively. Is it worth my time to hack it?”