Rust is usable for web development if you consider vanilla Python Flask without extensions to be the pinnacle of all web frameworks. The abstraction level in non-nightly Rust frameworks is shockingly bad. Standard features like diffing and generating migrations that are found in mature ecosystems like Django/Laravel/ASP.NET/Prisma are non-existent in Diesel. There is no maintained, out-of-the-box authentication solution. The only framework that try to tackle some of these problems is Rocket and it has been perpetually in nightly despite stable Rust compatibility having been achieved last year. (Companies using Rust need to donate and sponsor more)