This is an online collaboration / network effect acquisition. Not a tech acquisition.

(This is like Microsoft acquiring Github due to GitHub network effect)

While I too loved Fireworks and Dreamweaver, neither one had the network effect that Figma does (granted, SaaS software in the late 90s / early 00s was rare).

Even if Fireworks were to have flourished while at Adobe, it's not entirely clear they would have successful made both the pivot to web AND also gained the network effect that Figma has created.