Plus instead of deleting faulty code and replacing it, Windows just leaves the old crap in and stuffs it into thousands of useless files. Windows 3.10 was on six 1.44 MB floppy disks. Windows 10 is on something like six 4.7 GB DVDs.
Yes. Really stupid use of memory.
It is intentional to hide the things they don’t want you to see.
I built my first PC in 1982, it had an 8bit Z-80 CPU running about 4 MHZ. (incredibly noisy) And it had the maximum RAM that the CPU would address, 64K. (yes, less than 1 megabyte.)
It ran NewDOS 80 and was pretty darn fast.
So why the complexity today? Why the bloat?
If the public knew why, many would not own a computer.,