Not too long ago, Google disgruntled many power users by changing a shortcut in Chrome related to custom searches. Instead of being able to follow up a trigger word with a tap of the space key to start a custom search, Google forced users to press Tab. It quickly changed the trigger as it became apparent that people weren't willing to adjust their muscle memory that much. It looks like Google still hasn't decided on how to trigger keyword mode, as it's experimenting with activating it via a double space.
Chrome 88 brought some quality of life improvements like better password protection and tab search, but more and more people are noticing an unfortunate regression on the desktop version. For ages, it's been possible to add custom search engines (under chrome://settings/searchEngines), which you can invoke with custom keywords followed by hitting the space bar or tab. You could set up "acom" or "tw" for searching Amazon or Twitter right from your address bar, for example. But now, reports are popping up left and right that the space bar shortcut isn't working anymore. People are forced to use tab, making them relearn a years-old habit.