Maynard

(My sincere apologies if this is old hat and I misinterpreted your post.)

Basically all I know about LambdaConf is that they had a white supremacist speaking in 2016 and handled the reaction from the community very very badly. Their official blog post was.... not good, to put it extremely mildly. https://degoes.net/articles/lambdaconf-inclusion

Not the best article, but this seems to have the rough shape of it? https://www.inc.com/tess-townsend/why-it-matters-that-an-obscure-programming-conference-is-hosting-mencius-moldbug.html

lambdaconf has a history of inviting problematic keynote speakers and when challenged on this they've doubled down on their position