All too often being 'mobile first' means being desktop last. It feels like a betrayal when UX becomes a zero sum tradeoff between new users and the enthusiast users who built the platform and community to be what it is. User research metrics will favor the new users every time because inexperienced users tend to be the majority. Eventually, the enthusiast users leave, causing many to wonder why the original culture and appeal of a website disappeared.

But none of that matters, the conversion rate went up 5% so the product manager still gets promoted :)