The fatal flaw of depending on cue sheets (beyond how to carry them and keep the dry, etc) is when you miss a cue and keeping hoping you will see the next cue soon... I used to copy a map page on the back of the cue sheet but on long rides the resolution was so low you could never read road names to try to get back on track.
My Wahoo, and I'm sure all GPS units these days, gives you map view, cue sheet view etc. On multi-day rides I carry paper backup but could also use my phone as backup.
I do remember downloading a special Windows font for cue sheets back in the pre-GPS days.