i am an old user of joomla and i think since joomla is bundle with many library and custom directory name , UI component like bootstrap , Webflow technology should follow the way SQL/php js css image interact in joomla ! So i never think web flow could be compatible with joomla or other CMS that use their own concept to implement front end and back End .
I hope someone can claim that i totaly wrong !!
CMS implement all same concept ( for e commerce , blog , forum ) in many differents way and also support plug in . I ll be really efficient to use webflow without code ( css js image php ) any lines by simply add a plug in that let us click ( for setting properties/options). In joomla CMS, developper give some option to custom Front End using Back End ui and php can be easely modify without start from scrash !!
I ll update my knowledge about new technology in 2019 !!
Template l never disseppear . You have this concept in word , powerpoint or since the beginning with frontpage and dreamweaver
Search frontpage template in googlesearch engine ( template don’t mean interactive) , it only change the look of the whole/Main ui not the interaction. For custom ui of widget you have to understand how joomla plug in is implemented to change css and image !!