Last year Licat definitely said it would be out before the end of the year, i.e. 2020. He or Silver even said it would be a 3rd mode in addition to Edit and Preview, and that it would be the default mode. I am very focused on WYSIWYG because I came from Typora, and am still using it for some minor work. I ardently hope we’ll get WYSIWYG
As for it being on the short-term road map, I cannot remember the exact month but it most certainly is more than 3 months, which means the notion of “short-term” is being stretched.
Now, I know the devs don’t make timing commitments and I fully understand that, which is why I did not make any comments when nothing appeared last year as the project remained long-term, despite the “end of the year” indication.
But when a project moves from long-term to short-term, to me that means its realization is imminent within the next 1-3 months.