"I've been functioning for twenty decades," Daneel answered, "although I confess that much of me has been either repaired, replaced, or upgraded in that time." After all, being a robot didn't make him invincible to damage, and it didn't stop the onward march of technology -- however slow that could be on Spacer worlds.

He moved away, though he remained very aware of Lydia, and went to put the kettle on the stove. He'd made it a point earlier to familiarise himself with this ancient stove. It had seemed likely that it would be relevant sooner or later. To be honest, he wasn't entirely sure why Lydia wanted to talk about him, but if that was what she wanted he was only too glad to encourage it.