I'm presuming it's not a migration as much as a complete makeover/refactoring. Which could be interesting. Does that open the door to Foundation? That is, if you're going to more or less start over is now the time to jump the Bootstrap ship and climb on board with Foundation?
By migration I meant migration for a project that already uses Bootstrap 3 and considers using 4.
Speaking of Foundation, I dunno, it depends on one's needs.
Some people say Bootstrap is too big but I appreciate its vast collection of components. Especially when you do CMS / control panel kind of apps and you need to make them quick, Bootstrap is a saviour.
Also, aesthetically I like those rounded form controls, buttons and cards. Plus it takes only a few lines of scss to make bootstrap look branded, add custom fonts and most people won't even guess it's Bootstrap.
Yes. I got what you meant by migration :) My arc was that the difference from 3 to 4 looks to be fairly vast, and that you're all but rebuilding (i.e., it's a new site/application). Or darn close.
So if you've been considering Foundation this could be a window for Foundation to pick up some marketshare.
