I would not support this as it would be a distraction from the core function of Webflow - that of a web design tool. 

A related topic about Webflow's focus of development: https://wishlist.webflow.com/ideas/WEBFLOW-I-386

I think it is a great idea. Testing is and improving is a part of the process. There could be an option for making an alternative page in the page menu. As soon as the page is added there could be some form of activation of the A/B test and so on. 

I know it´s possible to do A/B testing with use of Optimizely, but it would be soo sweet having it integrated.

https://help.webflow.com/article/ab-testing-a-webflow-site 

This would be awesome and will become more and more important as marketing evolves and becomes more a part of what we as web designers & developers do.

If Webflow is going to be full fledged all in one web design tool and CMS...then having a A/B Testing is essential, especially if you want it to be the go to by agencies instead of Wordpress.

This needs to move up fast

I think this is a neat idea, but isn't that what Google Optimize and Optimizely are for?

I agree with Dominic Romito: Just use an A/B testing tool to do this. I wouldn't want the webflow team spending their resources on building a completely new feature that can easily be integrated for free.

I personally don't think Webflow should be focusing resources on this. There are plenty of great A/B tools out there as Dominic Romito commented.

At first it can be a simple feature like Intercom does to test the content (messages, images...).

100% for split testing. Especially with eCommerce looming.

Continuous learning and improvement is integral to a living site and should be part of your mindset and workflow.

Client sites with decent traffic can bring a recurring income. 

However you NEED that traffic, less than 1000 or so visitors a month and it's not worth the expense.