I am using Animate for 4 years (I started working in version CC2015) for html5 banner advertising. I have noticed that in every Animate update, the js files are increasing dramatically in their sizes.
Currently I have install version 2020 but I kept 2019 too. To refer you an example, I did an experiment and opened an old document with the two versions and did publishes.The results were 155kb(2020) vs 57kb(2019)!! That is a very big difference! That is a big problem to me because I upload my banners in a plattform that counts the file sizes unzipped.
There is a also a big problem to google gdn banners. The createjs library (I have to use it as a file externally) is increasing its file size too, in every animte update.
Our company clients requirements are the same, but year by year I have to limitate my final artwork because of the sizes (the advertising plattforms' restrictions remain at the same kb size limit).