mystral: The games Paradox make are niche (though Hearts of Iron seems pretty well known due to WW2 games being popular, shame they kind of ruined it with how buggy HoI 3 was initially). ...
Trilarion: For me they didn't ruin HoI. Bought HoI3 later and never had a real bug, maybe some mistranslated texts. I am looking forward to HoI4. Hopefully they do not increase complexity further, but concentrate on usability and fun and AI.
They didn't ruin HoI for me either, I enjoy it a lot now that most of the bugs and such have been patched out and the upcoming second expansion will probably make the game even better.
But I know a few people who bought HoI 3 at release because they thought a WW2 wargame sounded fun, were annoyed (rightly) by the huge issues the game had back then and promptly vowed never to buy a Paradox game again.
Hell, if I hadn't enjoyed the rest of the Paradox games so much I'd have been in the same boat.
I think they've learned their lesson then, though. The Vicky 2 release was much smoother (not without issues, but then no game as huge and complex can be at release).
They've also learned that trying to do too much all at once, as they did with HoI 3, is a bad idea because you can't polish anything then.