Chrome 73 is now rumored to add a feature that can organize tabs into certain sets to the browser. This may be most reminiscent of the similar function that Microsoft is reportedly set to bring to Windows File Explorer in the future. In addition, it is now alleged that Google will add a dark mode to Chrome 73 for Macs.
https://www.notebookcheck.net/Next-version-of-Chrome-may-have-Dark-Mode-and-tab-grouping-features.377886.0.html
Funny... Tab grouping was most used feature of Opera until version 12. After version 12 this (and many other features)features were removed.
This actually works for many years in Vivaldi browser (from retired Opera devs), using it for about 5 years. I cant really use a browser without tab grouping. This speeds up working with many tabs and you can easily manage over 50 simultaneously opened pages.
Will be interesting how this feature will work in native Chrome.