It's amazing how fast they converged; the first two (from 1997) look nostalgically mid-90s Web 1.0, but the 1998 homepage is recognisably a forerunner of the current one.

That change is pretty clearly pre- and post-Jobs' return/launch of the iMac. It's kind of crazy that they've maintained such a singular focus and style for so long, especially after the painful decade of constant reinvention and flux that preceded it.