Indisputable that he can't be replaced. To be fair, not everyone is an ardent fan. George Monbiot thinks he's betrayed the natural world he loves
https://www.theguardian.com/commentisfree/2018/nov/07/david-...
and
Matt Kilcoyne of the Adam Smith Institute thinks he's a national disgrace
https://notalotofpeopleknowthat.wordpress.com/2019/07/11/__t...
- reprinted from the paywalled Telegraph