That's what I still use but it's getting long in tooth and you're starting to notice lack of support for new formats and the like. I wouldn't really recommend someone who isn't already using it to switch. I don't really mind the subscription because it's software I use frequently but I need to get around to cleaning out my catalog before I switch over.

You can use Adobe DNG converter (free) or other 3rd party tools to convert new raw files to DNGs understood by Lightroom 6.