We have AT&T Fiber with 1000mbps service, and it makes almost no difference to us. Service is the same as our Comcast 25mbps internet service was before...
We recently upgraded to gigabit internet service (1000 Mbps up and down). It has REALLY helped. We use Frontier FiOS and previously had 50/50. I think it was their lowest tier but was always ample bandwidth for our needs.
But then... DS and DDIL moved in, along with 2 grandkids and 2 giant dogs. They had a fire at their house and it's going to be several months, maybe a year, until they can move back in. Long story.
Anyway, they obviously brought their laptops, their tablets, their cellphones, their streaming devices, even Alexa and a smart cam to watch the girls when they sleep. PLUS the biggie, they both work from home about 80% of the time, which mostly consists of Zoom calls and lots of huge files flying around.
So yeah... we all noticed a huge slowdown shortly after they moved in. After the upgrade, it's been smooth sailing. I even introduced them to a novel concept for millennials: ethernet cables. We have a mesh WiFi system with 6 nodes throughout the house, plus another 3 hardwired conventional routers/access points. The latency and bandwidth is typically 2-3X better when hardwired to one of those devices, vs WiFi.
Our monthly cost increased from $55 to $70, which isn't bad at all. I included it in their "rent" which the insurance company pays. When they move out, I may or may not downgrade. I kind-of like having all that headroom. And I see lots of IoT home automation devices in my future.
Point is, there is definitely a need for gigabit service, beyond the comparatively modest needs of the typical ER.org household.