I have no experience or advanced education in chemistry or material sciences. Do you think it's possible that a ban would spur innovation? I imagine our modern world has use cases that can't just disappear or settle for something not as effective.
Unfortunately probably not much - the relevant properties come from the element itself (fluorine) where there literally doesn't exist an alternative. It is possible that some alternatives will come to light, but there is a limited design space and it's not as if people haven't been looking for cheaper[0] and better solutions.
I'm curious as to the scope of this, and what end products are effected. A lot of the best-in-class greases (krytox) and orings (FFKM aka kalrez) rely heavily on fluoro-components. FFKM orings in particular are head and shoulders above everything else by ~100C worth of working temperature range. FKM 'Viton' orings are also incredibly popular and are widely used in automotive applications for temperature and oil resistance in addition to having major industrial uses.
[0]Fluorine is a real PITA to produce and make derivatives from - environmental issues aside functionally equivalent non-fluorine compounds would almost always be cheaper.
For consumers goods there are already many alternatives though. Ceramic nonstick and nanotech based water repellents come to mind. They are good enough for average people who aren't avid hikers or foodies.
I wouldn't be surprised if they started using other plastics in frying pans one day, meant to be used with some fancy temperature control induction system. Lots of stuff is slippery enough for food applications, you just need one that's safe at the temperature oil gets to.
I doubt my life would be affected much at all without any fluoropolymers in goods I directly own.
A ban does stimulate innovation, as the banning of CFs shows (See Montreal protocol), It spurs innovation for alternatives as there is good money in it and it also spurs innovation by end-users. It is a long and slow process though.
