To be honest though, I don't think she's ever been more than superficially minimalist/sustainable. She basically fell into it as an offshoot of the whole creepy weird vegan Freelee/Durianraper crowd. Madeleines unique selling point was that she didn't really fit into that crowd because she was too posh and uptight - she almost created a niche for privileged posh girls who didn't fit the vegan/crusty/hippy/bikini babe influencer stereotype. I cannot imagine for one second that Madeleine enjoyed travelling around roughing it without all her comforts, and the lack of ability to control everything would have driven her batshit crazy (and that's with her wee french bulldog Alex rushing round trying to fix everything she didn't like.
I get the feeling that these days she is trying to brand herself as some kind of vegan/style/decor Nigella but she fails because she lacks Nigella's warmth and sexiness, and she isn't really an inventive or creative cook. In fact, if she wasn't vlogging I don't think she would cook at all because she's far more interested in either eating out or packaged and pre-prepared meals and snacks.