My personal opinion is people should instead positively and accurately emphasize and credit GSAP for being the best animation framework since AS2 (nearly 20 years ago) and onward to this day.
Literally - Animate Anything. 
- https://gsap.com/
- https://gsap.com/docs/v3/
- https://gsap.com/showcase/
- https://gsap.com/community/
- https://gsap.com/blog/
- https://gsap.com/demos/
- https://gsap.com/cheatsheet
- https://www.youtube.com/@GreenSockLearning
No other animation library has been as comprehensive, managed, supported, recurrently compensating for browser specific bugs and deficiencies, continually updated, etc. No similar library is used as part of so many award winning sites or used to facilitate engaging brand awareness by companies as much as GSAP is. Let me emphasize again the fact that GSAP has always been fully and actively supported and updated since its inception.
Jack the founder is a brilliant compassionate person. So I doubt he sold the nearly two decades worth of work and effort he put into GSAP with the intention of seeing it all get dismantled. Even more so knowing what that would then mean to all the customers whom have depended upon his library all these years as the best animation platform.
Would guess instead that he secured his long term intensions for his library during negotiations to ensure GSAP would remain the best animation library available to the web in every regard, to everyone and beyond what it already is. This has been his passion for nearly 20 years and no one has executed it better.
Can’t imagine much changing, instead GSAP should only get better with Webflow’s funding and support. Most people used the previous free version anyway, so for most that is not new. Except now those people and everyone get full access to all the wonderful and powerful GSAP plugins free, even for commercial use.
I continue to look forward for many more great things to come from GSAP. That’s my take on the matter and I look forward to using GSAP through <script> code </script> indefinitely, its been a great and fun ride since the AS2 version.
Keep Coding ! 
PS: Webflow is moving in all kinds of directions, now with their Cloud they offer users the ability of React, Next, Astro etc.,
I really like this sentiment —
“our vision is for Webflow Cloud to be agnostic across JavaScript frameworks and libraries to ensure developers can work in the tools that best support their use cases”
I hope Piny grows and becomes truly agnostic. 
It truly could become a dev unicorn if it desires.