Difference between Photoshop 2020 and Photoshop CC 2019

Thank you all for your replies and explanations! definitely you helped me a lot understanding theese themes.

Have peace and good days for everybody! Thanks again!

You should never remove an old version of Photoshop till you sure the new versions is working well for you work.  New versions of photoshop always have new bugs.  You should always have an old working version installed just in case an automatic update brakes the latest current version.

In the announcement  at the top of the forum there are links to what is fixed and what is new.

The frame tool has problems for it uses Photoshop place which has problems . The frame tool has other problem as well scaling images it to frames. It will scale down but not up.  IMO the Frame Mask thumbnail being on the left of the Layer Content thumbnail messes the format of the layers palette.  Photoshop Layer Mask and vector Layer Mask have never had a problem framing images.   The Frame tool is not needed.  I removed the Frame tool from my tool bar and disabled its  Shortcut.  Its not completely gone from my Photoshop there are some menu item for layer I can not get rid of. If You go toe Adobe  feedback site you can find some bug report there photoshop-2019-frame-image-scaling-problem 

Use the advanced search to find other bug reports

1.  Creative Cloud upgrades used to remove old versions by default.  And everyone was unhappy about it. Now if you want o remove old versions, you must check the box for it in Advanced settings.   But I don't recommend removing old versions until you're certain you won't need them again.   I currently have 4 versions of Photoshop on my workstation just in case.

2. What's new in Photoshop 2020?

https://www.youtube.com/watch?v=ZIXM37H0mzs