Why 2.5 gbps for home use?

I keep seeing may talk abouy the jump to 2.5gb or 10gb in their home lab. Im just curious why folks need this? I can understand if you are editing videos, running some income producing hosting from home, or if its just because you dont want to wait for file copy jobs to complete. But for the more casual home lab with plex and file hosting, is 2.5gb really needed?