I'm going to attempt to stay off my soapbox about this topic but do want to say a few things. Before I really get going, one this @LvnLife is CMS hosting including the custom domain is $10 not $15 I think.
Wordpress and businesses (especially small to mid/large sized business) have in my experience often have love-hate relationship with Wordpress. It's what they have been sold, what the web says 40% of sites built are made with and what clients are often used to using so they feel like they should continue to use it. Often however, in the same breath they will complain of slowness issues, functionality, poor SEO (usually due to repeat content or poor SEO strategy), and ultimately the complexity of keeps them from utilizing the site well...especially if they have broken something along the way and don't want to again.
With Webflow you are getting a completely customizable solution for the design and function that doesn't need a bunch of plugins but that you can add scripts to in order to increase functionality. If hosted with Webflow, it's fast and secure.
Currently, Webflow does have a couple items that probably need some shoring up so that we can just keep telling clients "yes we can do that" – true pagination, native ecommerce with inventory control, sorting of dynamic list so it excludes the current item from a listing on the same page, SEO/OG data for dynamic content per entry, and although not necessary it would be great if in addition to the account password to access the dashboard there was another (optional) password layer per site to access the designer or settings for that specific site. Several of these things the Webflow team has already said they are working on.
Webflow has only been around a few years and the product has grown/improved significantly. And WOW the responsiveness of the team is fantastic...they listened to their customers and users about pricing and adjusted!