Availability and ownership aside, Blu-ray is far better quality than what you’ll get on most streaming services. If I really care about a movie or show, I always get it on Blu-ray.
That said, if they could shift 1080 BDs down to DVD pricing and UHD BD down to what BD costs now I would buy a lot more. I’m starting to build up a collection of UHD Blu-rays but Jesus, £20-30 per movie really adds up. Definitely paying the enthusiast tax there.