Wonder if OP could A/B test the two designs?
Just to pick on one example: Android. Google absolutely loves changing the settings and UX on each major version. People use these controls so much they eventually get habituated... until they change and have to go hunting around and learn the new workflows to get back to par. Each one of these redesigns probably wastes millions of cumulative user hours.
The other day I had to cross a little tunnel and I couldn't put on the light on the phone until I rebooted it -_-'
Just when I get used to a layout, they pull out a new design, completely disorienting me.
Honestly, I feel like the only way of working around this is having multiple different interface options available.
For example, the new Reddit look is more app-like and certainly has improvements to the user profile pages and whatnot. Yet for certain types of browsing content, or wanting to do it without your browser slowing down as much, the old interface is still available:
https://www.reddit.com/
https://old.reddit.com/
Many out there will stop using the site the day when the old interface goes down and for now can just use the old one despite the new one being available - thus allowing them to stick to the user experience that they're used to.Of course, not many out there want to deal with something like this on the development side, such as CRUD systems that would need to move fields around, add new business process steps etc. There, maintaining two separate versions would be a massive pain.
Many times a user not wanting to switch to a new UI isn't based completely in effort/adaptability but a history of experience with product life-cycles weighing more towards business objectives over time. e.g. Facebook calls users lazy for not trying out "improvements" and blame old soccer moms for being inflexible when they're just trying to extract more money. Not that businesses spending effort to get more money doesn't make sense, because it does, but businesses love to lie about this common user complaint.
Reddit is a glorified web forum. Period. Making comments hidden and difficult to browse basically negates 50% of it's function (the other being media + content discoverability).
Of course it's extremely badly aligned with their regular user's goals of reading comments, but that's solved by using the old.reddit urls if not the app, whilst the casual browser coming in from Google or a link gets the full on contempt for users' desire to actually read threads UX until they've bumped the user engagement metrics up by clicking on more stuff.
https://i.reddit.com/