Think about it this way: bitcoin is censorship resistant, fixed supply money. You can actually own bitcoin and no one can seize it from you.
But these attributes are not free. They come at a cost: 10 minute block times, limited block space, needing to run a node to verify the bitcoin you receive.
Things like ecash are being explored for use cases where people don't necessarily need or want to pay for all the heavy duty benefits of bitcoin, but they want some of the benefits.
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Class of 2022, I've felt the same.
Is there a worse name for a bitcoin tech than fucking "Fedimint"? lol
These are all attempts to scale bitcoin, but none of them is definitive yet. Will there ever be one?
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It's more like ecash is a tool for bitcoiners to use. It lets bitcoiners do things they can't do with bitcoin (currently, maybe this changes) but it doesn't really scale bitcoin. It doesn't allow more people to use bitcoin because it's not bitcoin. But it still may be useful.
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We are so early!
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Is Bitcoin not enough to succeed as sound money? Why do we need alternates?