> But I understand that disabling the overall wrap around is more
> difficult since it has to be implement on a deeper level of the
> display engine.

Indeed, the required change is on a deeper level of the display engine,
but it's quite simple like in the attached patch.  I wonder is it
appropriate to reuse the existing option 'auto-resize-tab-bars'
whose new value 'truncate' will force tab-bar truncation: