I can deal with the company-side limits and in fact we have been making changes to handle an expected increase. For example, activating the remote-access server in both production and DR sites so we can use both Internet connections.
Also, split tunneling can be your friend (although it does come with risk). By taking web browsing off the corporate ISP, it frees up lots of capacity. Even just splitting off streaming video/audio and office365 will help alot.
The less solvable problem in my mind is the home-side. There, we are competing with lots of kids watching Netflix and neighbors also working from home. Although your last mile might be dedicated fiber, it still hits the same CO (central office) and from their depends upon their uplinks, which also are being stretched harder than ever. And mobile tethering won't help either because all roads leading out of town will have serious congestion.