Don't worry, metal and fiberglass too! At least with materials if one source disappears, it's not a redesign to use another source (just eats into your margin)

Don't worry, metal and fiberglass too! At least with materials if one source disappears, it's not a redesign to use another source (just eats into your margin). Not so lucky when it's critical ICs with whose manufacturers you had long-term deals (for continuing production) until their factories burned down and/or got destroyed in natural disasters.