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For Bitcoin nerds like us, yes we can do it, although I have not found any motivation to set up a node and join the Lightning Network yet. But for an average user of "Bitcoin as a payments tool", it would take more effort, time, and more eading.
This was exactly my concern. Many people won´t bother with using an Arduino and instead will
rely on their credit card and let VISA handle the "server stuff" and the "technical details".
Of course it would be trivial for more tech-savvy people, but the average citizen probably
has to be incentivized to use the LN in another way.
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As stated elsewhere in the thread, eltoo simplifies the situation, and there's probably more room for improvement too.
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I did some reading regarding eltoo after you pointed out eltoo the last time.
However, my impression was that eltoo needs certain additions to the Bitcoin protocol
that haven´t been implemented so far.
https://www.bitcoinlightning.com/eltoo-protocol/The Eltoo protocol is gaining steam among LN advocates. To institute Eltoo, it will be required to add the SIGHASH flag and SIGHASH_NOINPUT to the Bitcoin protocol.