Speaking as one of them millennials that seem to be so popular these days, BYOD was never, ever a selling point for us. Not foisting underspecced, trash-tier kit is. Yes, 4GB, 1366x768 thinkpads I'm looking at you.
I would (and did) take the job that's going to be spending £3-4k outfitting me with the gear I need to do my job effectively over someone who's trying to force that cost onto me.
The good bits of BYOD should be taken to form a choose-your-own-device approach. Give your staff the flexibility and budget to pick the kit they need rather than force them into a one-size-fits-all bucket.