I remember my marathon plus having very so/so ride quality and traction.
That and never finding a tire with more than 7mm of rubber, plus extremely squishy rubber ( which compresses under load easily and becomes 4mm or less )
Even the Schwalbe pickup is on the wimpy side due the super flexy rubber and low maximum PSI.
Maybe this super flexy rubber would be ideal for a 150lbs rider, but that's not most of us ebikers, you know
The Kenda Drumlin Cargos have 2-3x harder rubber. If you try to compress it by hand, it doesn't have much give.
The Kenda Drumlin ( regular ) has 2x harder rubber also.
Shoving a metal pin into either requires a lot of physical force, whereas with the schwalbe marathon pro, it slips right in due to the wimpiness of the rubber.
This might be why, despite seeing up to 11mm goathead spikes in the field, my current 8mm tire has never been punctured by one in 300 miles. On regular bike tires, i'm flatting every 5 miles.
I see better handling and slightly better rolling resistance with the Kendas.
They don't feel like "puncture proof tires", they just feel like thicker and harder bike tires.
When you have a big hub motor, a heavy rider, and high speeds, the harder rubber also makes more sense because the forces on the tire are much more greater than they would be at pedal speeds.
But your area might not be as demanding as mine.