Here’s an old post I found for you Max. This is a post by Keith ( Boss) in response to a Mac user’s request for a release date for Mac Scriv 3. Note the date…
"WED SEP 21, 2016 5:23 PM POST
Hmm, a few words, let’s see… How about “writing”, “tutorial” and “now”? 
We’ll have news soonish. The hard part is going to be letting our Windows users down gently. The macOS update is likely to be a good six months ahead of the Windows one (like an inverse Microsoft), but our Windows developers are working on a 3.0 to match the macOS version (in case any Windows users happen along here)…"
Six months, well it has been nearly ten, but the Windows Scriv3 is slowly getting there. Would have thought it will be awhile yet. Put it on your Christmas list ( not necessarily the upcoming one.)