I respect anyone brave or foolish enough to do a drive swap on a iBook.
I've performed this procedure numerous times. While it's not particularly difficult, it requires patience - a LOT of patience. Dozens of the world's smallest Philips-head screws. The iFixit guide helps tremendously. What strikes me as nostalgic is how repairable these machines were. No proprietary screws, the HDD used a standard (at the time) form factor and interface. The batteries could even be torn down and rebuil…
I too lament how closed machines have become and how it affects the environment, data recovery, and just plain ol' repair. Some of those PCI Macs with 603s, 604s and G3s could get up to G4e with CPU boards and industry-standard PCI cards (so long as they had a Mac driver.) Now you can't even add your own storage to most Macs, and the one with PCIe won't let you use your own graphics card.