As an extension to the soap, there are single squeeze detergent bottles now that precisely meter on a one handed squeeze. So simple, yet phenomenally useful.
A agitator "tub washer" uses 40-gallons of water to wash clothes. A modern front-loading HE washer uses 10-gallons.
If you use the same amount of soap on both washers, you'll naturally be either... adding too much soap to the HE washer, or too little soap to the agitator washer.
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Same thing with "Tide Pods". The idea of those things is "one pod per load", which removes the mental need to think of how much soap to add per load. But... once again, there's many different washers that all use different amounts of water. There's no way we really have a one-side fits all situation.