  We present continued radio and X-ray observations of the previously
relativistic tidal disruption event (TDE) Swift J164449.3+573451 (\sw)
extending to about 9.4 years post disruption, as part of ongoing campaigns with
the Jansky Very Large Array (VLA) and the \textit{Chandra} X-ray observatory.
We find that the X-ray emission has faded below detectable levels, with an
upper limit of $\lesssim 3.5\times 10^{-15}$ erg cm$^{-2}$ s$^{-1}$ in a 100 ks
observation, while the radio emission continues to be detected and steadily
fade. Both are consistent with forward shock emission from a non-relativistic
outflow, although we find that the radio spectral energy distribution is better
fit at these late times with an electron power law index of $p\approx 3$ (as
opposed to $p\approx 2.5$ at earlier times). With the revised spectral index we
find $\epsilon_B\approx 0.01$ using the radio and X-ray data, and a density of
$\approx 0.04$ cm$^{3}$ at a radius of $R\approx 0.65$ pc ($R_{\rm sch}\approx
2\times 10^6$ R$_\odot$) from the black hole. The energy scale of the blastwave
is $\approx 10^{52}$ erg. We also report detections of \sw\ at 3 GHz from the
first two epochs of the VLA Sky Survey (VLASS), and find that $\sim 10^2$
off-axis \sw-like events to $z\sim 0.5$ may be present in the VLASS data.
Finally, we find that \sw\ itself will remain detectable for decades at radio
frequencies, although observations at sub-GHz frequencies will become
increasingly important to characterize its dynamical evolution.
