Should I use Ethernet (wired) backhaul with a mesh system?

Verified-purchase reviewers and Reddit threads strongly recommend wired backhaul where possible. Owners of the Deco XE75 and XE75 Pro repeatedly cite Ethernet backhaul as the key to hitting their full internet speed and eliminating drop-outs, and the same advice appears for Orbi and eero systems. If you can't run cable, choose a tri-band model that reserves a band for wireless backhaul.