Working from home doesn't take much bandwidth, that's the part most people get wrong. What it does take is a steady upload and boring, predictable latency . I've watched a 50 Mbps fibre line with 5 ms of jitter run circles around a 500 Mbps cable plan that swings between 10 and 40 ms. Your call quality lives in those small numbers, not the big one on the marketing brochure.
So when people ask what speed they need for WFH, the honest answer is: probably less than you're paying for, but on a connection that doesn't buckle the moment someone else in the house opens YouTube.
Cable plans often have 300 Mbps down and 10 Mbps up. That 10 Mbps is the number that decides whether your camera looks like 720p or 480p in a meeting. Fiber and 5G fixed wireless usually offer symmetric upload, worth the upgrade if you do calls all day.
Run a speed test before your first meeting of the day, again at peak neighborhood load (8-10 PM), and once during a real call. The third number is the one that predicts whether your meetings will hold up.