No more floating panels on figma

So figma introduced the floating panels a while back and every designer I know hated it. Although myself I couldn't care less as I adapted to it quickly. Now they are reverting back to the fixed panels.

My question is what kind of research was done at Figma that they failed so miserably? I am sure the product designers at Figma must be very experienced. How does research play a part here?

Another scenario Framer looks very similar to what figma is right now with floating panels and design language. Considering Figma launched itself with floating panels and not fixed, would customer reaction to it be different? Is it only being hated because the people that use figma are use used to the old style?