Exactly this. There are some logistical complexities (e.g. some of our bandwidth is funded by the E-Rate Universal Service Program for libraries which runs on a July-June fiscal year and so rapid upgrades on that front aren't possible), but by and large egress bandwidth isn't our primary challenge. Intersite links as I noted in the video are the current big one, and that can and does involve occasional time-consuming construction -- but honestly over the past year, a combination of total blowout of my usual capacity planning (including equipment budgets) plus the logistical complexities of lockdown have resulted in slowness to upgrade as fast as we'd like to.