  We present a comprehensive analysis of electroweak, flavor, and collider
bounds on the complete set of dimension-six SMEFT operators in the
$U(2)^5$-symmetric limit. This operator basis provides a consistent framework
to describe a wide class of new physics models and, in particular, the
motivated class of models where the new degrees of freedom couple mostly to the
third generation. By analyzing observables from all three sectors, and
consistently including renormalization group evolution, we provide bounds on
the effective scale of all 124 $U(2)^5$-invariant operators. The relation
between flavor-conserving and flavor-violating observables is analyzed taking
into account the leading $U(2)^5$ breaking in the Yukawa sector, which is
responsible for heavy-light quark mixing. We show that under simple, motivated,
and non-tuned hypotheses for the parametric size of the Wilson coefficients at
the high scale, all present bounds are consistent with an effective scale as
low as 1.5 TeV. We also show that a future circular $e^+ e^-$ collider program
such as FCC-ee would push most of these bounds by an order of magnitude. This
would rule out or provide clear evidence for a wide class of compelling new
physics models that are fully compatible with present data.
