Unfortunately, Apple seems to be alone in having a good implementation. Using the old PXE, you expect to see some dos-like screens and slow loading but with HTTP the experience is not much better. Any decently sized bootloader is downloaded at a snails-pace and the user is presented with a very technical screen. Fine for rescue-boot like purposes but not fine when your daily driver is expected to be booted from network. I had especially expected better from Dell but the experience is... lacking.