In practice, you can get very far with high speed interfaces while never using a high-speed scope. I've spent years professionally doing HDMI, DisplayPort and L

In practice, you can get very far with high speed interfaces while never using a high-speed scope. I've spent years professionally doing HDMI, DisplayPort and LVDS interfaces with FPGAs and never had the need for scope shots. (Admittedly, a colleague did use it, but that was always for certification related measurements which is a non-issue for hobbyists.) Part of the reason is that the specifications for these fast interfaces are created for robustness. They can sustain a lot of PCB design abuse and still work fine in practice even when out of spec.