>> > I didn't alter tab-bar-mode to tab-bar-lines as Martin
>> > suggested.
>>
>> When did I suggest that? IIRC I only said that I don't know which of
>> the two you wanted to fix.
>>
>
> I meant this suggestion you made "(> (frame-parameter frame 'tab-bar-lines)
> 0) is more reliable" than "((and tab-bar-mode";
Ah yes. A frame might have no tab bar even if tab-bar-mode is enabled.
One can use tab-bar features without displaying the tab-bar, though. tab-bar-history-mode as a winner-mode replacement works. tabs still work as window-configuration controls even without a visible tab-bar, isn't that right? I don't use it this way but I think it works.