Stalker has a DircetX 8 renderer. All 3 games in the series have it, the last one dates from 2009.
For good reason. Their market is largely in eastern Europe.
Mount & Blade (2008-present) has a DirectX 7 (!!) renderer for people who need that.
Again for good reason. The Mount&Blade collection I saw in a shop yesterday is 35 euros. That is a lot of money. By lowering the system requirements, more people buy the game, giving Taleworlds money that Taleworlds would otherwise not get.
If I made an indie game, I sure as heck wouldn't make it require DirectX 11. I would have to be stupid.