The original Macintosh (1984) wasn't too bad:

System 1.1 boot: 0:12-0:30 (~18s)

MacWrite startup: 2:10-2:25 (~15s)

https://www.youtube.com/watch?v=6pGz9Zwsz_I

Steve Jobs on Macintosh boot time: https://www.folklore.org/Saving_Lives.html