I too was drawn by this feature at first. But then discovered that with pages and pages of formulas, the rendering gets too sluggish which also impares the editing. So I had to disable the rendering just to edit some formulas.
While I still see a use for Typora, especially due to its convenient export into .doc, I'm already considering alternatives.
They did not exclude possible charge for major upgrade.
I am not relying on typora. I use it for WYSIWYG markdown editing with equations. Actually I like more the functionality to copy pasted image to a folder - that is the only feature I really like.
Great to see that they won’t be going the subscription route.