Controller - laptop setups are common for house parties, and for bars and events that keep the same dj all night, but less common in clubs where the CDj’s with USB sticks make it easy to switch over. A CDj needs a DJ mixer, to which you can also hook up a record player, so mixing both is not too hard.
Personally I find vinyl a bit daft for new music since it’s all made on computers anyway! For older music it makes a lot of sense though, much of it never made it to digital.
DJing with vinyl is fun as hell, gets me away from my screens, let’s me find music in a really satisfying and interesting way AND takes me to shops where i talk to people and learn things from them. The digging is maybe the best quality — walk into a place with a limited set of music, guide your search based on categories, album art, personnel listed in the sleeve etc. Digital provides almost none of that; digital “digging” tends to get boring and overwhelming, both.
Old man stuff, probably, but I do think there will always be some ppl tuned to wax. As soon as you want something you can’t find digitally you have to anyway, and from there it’s a slippery slope.