The Amiga only loads its equivalents when needed.
Please tally Amiga's available services to Windows XP. Note that WInXP explorer(with browser engine) is it’s the main shell.
I don't recall AmigaOS 3.9 has the following
1. DirectX8/DirectX9 class APIs.
2. OBDC infrastructure(for basic application infrastructure).
3. OLE infrastructure.
4. Computer Browser//Keeps track of PCs in the LAN network.
5. Transparent CD-Burn and support for DVD-R/RW.
6. Local multi-user infrastructure.
7. Local Server services e.g. print and share.
8. MS/Roland GS Soft_syn (Midi).
9. 16/24/32bit Audio support (DirectX). Support HDCD (via MP9; included in WinXP MCE(2003) and 2003 Server).
10. HAL, "CPU driver", ACPI, Monitor profiles, Firewire, UDMA Mode 5 (133), Microcode Update,
11. Basic Terminal Service (expanded in SP2).
12. 'etc'.