Because I always use hotkey to awaken sidebars, the waiting is really uncomfortable, and I know this is totally due to the UI design.
For comparison, when we use CMD+P or CMD+O to quickly select functions or files, it is really fast and comfortable! one of the major advantages of Obsidian over other Apps like Notion is that it is extremely fast, we may take the advantage more.
Proposed solution
Just put an option in the Preferences, so we can get the feature.
Current workaround (optional)
No workaround now, no plugin can make this feature.