We are currently working on introducing the Classic theme into core for Moodle 3.7, as the Bootstrap 4 replacement for the Clean theme (mentioned previously here). One of the features available to Clean is 'block docking', which essentially allows you to hide the content of blocks within a dock until you mouseover/click the block name on the side of the page. The intention is that the blocks take up less screen real estate when not in use, while still being available.
Re-implementing the block docking functionality using the latest standards and best practices will be fairly complex, so before moving forward with development of that feature in the new theme, I would like to ask for the community's input on whether you use the functionality on your site or in your custom themes, or is it largely an unused feature? For example, do you use it heavily and find it essential, are you indifferent or find it occasionally useful but more of a nice to have, or do you even disable it entirely? Your feedback will enable us to properly assess whether this functionality is required, and if so, prioritise it correctly.
Please also feel free to vote on the Tracker issue (MDL-64567) if you consider it important functionality.
For anyone unsure what I mean by 'block docking', here is an example, where two blocks are docked (achieved by clicking the '<' icon on the blocks in the Clean theme), and I have hovered over 'Timeline' in the dock to make it visible:
Thanks in advance for your input!
Open Source Developer