Read the fine print of the caption in the image of what Wikipedia would look like in Mongolian script, at Mongolian script – Wikipedia.
Mongolian Wikipedia preview. A representation of what mn.wiki would look like if Mongolian script support was properly implemented. Mn.wiki already exists, but support has not been implemented. Not all text is “real Mongolian” — only the actual text of the article, and the name thereof.
Vertical scripts are not well supported on computers. Until they are, abandoning Cyrillic would be suicidal for Mongolia. Conversely, of course, if they don’t abandon Cyrillic, there is little incentive for anyone to improve vertical script support.
There are cases where national governments have lobbied Silicon Valley to improve their scripts support. I wish I remember which Asian country it was, but I’m pretty sure it wasn’t Mongolia.