I just want my colorful threading back. Every time someone 'improves' the Gmail UI, it gets harder and harder to use. Back when each new message in a thread ha

I just want my colorful threading back. Every time someone 'improves' the Gmail UI, it gets harder and harder to use. Back when each new message in a thread had a different-colored header, it was vastly easier to use by skimming. Now, with everything in various shades of monochrome, threads collapsed or expanded, quotes hidden or not hidden, signatures here and there, it's virtually impossible to tell at a glance where one message begin and the other one ends.