You can make a «cool» design on the old platform, but in the future its support will be a problem.
Most sites look outdated. Most are obsolete even before they are launched. The whole problem is the designer and the capabilities of the platform on which they are implemented.
At the start, the budget and enthusiasm still allow developers to create something interesting from the site, but the price of updating the site in the future becomes too high. Attracting another development team is a problem.
Webflow platform was originally developed as a tool that allows you to create complex animated projects with a responsive layout. To make adjustments to the project, the participation of one designer is enough.