Our site is scheduled to migrate to the new MarkDown handling on the 17th of June, 2020 as explained in this meta.SE post. If you have any issues with the handling of markdown then please let us know.
The main difference is that code blocks will have to use the new fencing format (which you will probably quickly get used to, if you haven't already). Furthermore, lists and such must have correct spacing if you want to have separate paragraphs included like this:
Something part of something, with correct spacing up front.
The $\TeX$ site is already ported over, so I don't expect any issues in that regard. All other features should keep working as expected.
If you experience any issues, please create an answer here. We'll evaluate and possibly (let you) post on meta.SE if necessary.