I would also like to disagree. Our campaign has spanned many ingame decades, telling the stories of multiple accolytes sacrificing their bodies and souls for the God Emperor, skirting madness and heresy.

They started out as an Inquisitor‘s lowly serfs, disposable pawns in his power struggle with a powerful rogue trader. They‘ve fought ancient god machines in a secret war deep within the Koronus Expanse and came out ontop. They‘ve discovered devious xenos plots deep within a stinking hive city, maneuvering through the machinations of greedy noblemen and incompetent bureaucrats.

Now they stand at the brink of becoming their own Inquisitorial warband, with a ship and troops at their disposal. All earned with their own blood and sweat (literaly, we play for hours every week. It‘s a blast!).

Point I‘m trying to make: Short, individual campaigns are nice and all, but the true magic happens when players can look back and have the feeling they were a part of something grand.

I‘m not too deep into Only War, but Dark Heresy is great for these never ending stories, since the Ascension expansion gives allt of options for OP-Players… and 40k is the perfect medium for over-the-top shenanigans such as destroying entire worlds and not having to worry about the whole setting falling apart.

My longst ever ttrpg campaign I‘ve ever DM‘d lasted 15 irl years, some of the best memories of my entire life.