Going for a cup of coffee means physical walk. Detaching from focussed mode means your mind gets in diffused mode. This is where/when creativity ensues.

One thing to remember is 2.5 gbit/sec uplink is shared between all clients. So if one client is on 1 gbit, and one client could saturate their 1 gbit while switch and router can handle better. An advantage of that is QoS isn't needed to be applied manually.

So, for example, it maybe worth it to have higher than 1 gbit uplink on switch to router, and maybe a server to switch, but devices such as your TV or WLAN clients do not need such.

75 mbit up is pretty good compared to DSL (I bet it is cable), and yes 1 gbit up is nice for off-site backups. But the upsell of going above 1 gbit symmetric IMO isn't there.

Cable providers know this. Which is why they sit below 1 gbit symmetric, at a level average subscribers are comfortable with.