I believe that, if a quality, reasonably-price resistance trainer had been invented before the roller, rollers wouldn't exist. Or at best, they'd be a novelty used by very few.

Some traditions are slow to die, even when their time has come. Like tubular tires. And terrestrial radio.

I tried "looking back" tonight. The drill, look back long enough to identify something on a shelf in the garage.

Quick glances was all I could muster.