The recent iso's are badly updated:
- more than one CU integrated for w/e reason
- all the telemetry is most probably in there
- the size of a single index iso is 5GB+, which is roughly the same as a 64-bit AIO with integrated updates, .net 4.8, visual c++ runtimes and directx
The common joke is those iso's were made by newbie interns and are really highly NOT recommended.
Just download a clean media refresh iso, use simplix updatepack on it(download abbodi's addons and put them next to the updatepack if you want). You'll achieve a much better result.