@AllBetsAreOff It won't get cut off, they'll see the whole post. If a post is longer than a certain length, it gets "cut off" with a 'Read more' link, so no worries.
The only little annoyance with long posts is when they're behind a content warning, then they won't get cut off with a 'read more' link if you have set up your client to automatically expand any content warning.
But other than that, you're all good.