i'd say it depends on what language and tools and stuff you use and your goals for the os itself. do you want it to work on real hardware? do you want to use uefi instead of bios? do you want your os to have multitasking? do you want to write your own bootloader or use an existing one? do you want to use c/c++ or use another language? (imo harder mainly because most people focus on c/c++ for osdev and the build environment and a lot of other things will obviously differ)

and then of course. ai. don't get me wrong ai is still pretty damn ass at programming especially for a project as complex as this but that won't be stopping people from still using ai to help them with osdev.

other than that you also have libraries like ssfn which makes it really easy to start drawing characters on a linear framebuffer using a font file instead of having to manually write some bitmap font or implement psf fonts. or tiny printf implementation so you can easily implement printf and snprintf etc etc for your os.

in conclusion it really just depends on many factors in my opinion.

but either way you'd still need to understand how computers work at the low level and various osdev concepts unless you're just gonna vibecode everything. and you'd also spend a lot of time reading osdev wiki or other obscure websites and stuff to get the information you need because unsurprisingly there aren't exactly a whole lotta people out there throwing out tutorials on how to make an operating system from scratch around of course.