There are : the way thumbnails are handled, and fixes about I/O
→ those could prevent many slowdowns while browsing and deleting files.
→ Emptying trash makes session freeze then log out
→ https://www.omgubuntu.co.uk/2020/03/linux-mint-20-release-features ↓
Major performance improvements in Nemo , the default file manager of the Cinnamon desktop environment, also feature in this release. File thumbnail generation, a task which is at the cause of slows down when browsing folders and files, is being tweaked to deliver faster, more responsive navigation.
The solution: show generic icons prior to thumbnails loading. The impact on navigation is said to be considerable. Rendering file thumbnails in Nemo now happens after all the files have loaded into view.