Q 4 all: Is there away to split long posts to continue them onto multiple pages?

When I had a simple WP site a while back, I used a very simple plugin called Easy Multiple Pages to split up long posts so that they continued onto second or even third pages. But that plugin hasn’t been updated in three years, so I’m wary of using it on my new WPMU sites, and I can’t find another plugin that appears to do the same thing. Am I missing some simple way to do this? Or do any WPMU members or staff have a plugin that they’d recommend for this? Thanks, Ken