That said, Lucee is a well-maintained, open-source variant of CFML that you can use today. I still maintain a significant production app that uses it.
The only thing going against it is prejudice, IMHO.
I don't know of anything that still ticks those boxes but if you're just looking for (1) easy-ish, (2) interspersing HTML tags and code, and (3) server-side rendered simplicity, then PHP is still a very viable successor.
Early PHP was almost always embedded in HTML, like CF. It's been many moons, since I've worked that way, but many developers still do.
(I stopped using it nearly 20 years ago and don't know what has happened since).
I would agree that PHP and CF (at least CF of 20 years ago) are pretty similar conceptually.
I also remember coming across something called Railo that appears to have come before Lucee.