Everything here is my opinion. I do not speak for your employer.
From a presentation by Srikanth Sundaresan. In short: latency matters, a lot. Things stop getting better after 16 Mbps or so.
He claims that DNS prefetch (prepopulating a local DNS cache with popular names) can speed things up by about 10%.
My latest project is Tailscale: the easiest way to use WireGuard and 2FA.