The more I dig, the more I don't see a good reason to increase the op_return. This is a bad decision.
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AFAIK it helps stuff like silent payments and bip47. Thats a win.
There's silent payments which work without relying on op_return, so there's privacy there.
Keeping op return at 80~ bytes, or going back to 40~ bytes means a lot of non financial data is kept out, like for example inscriptions, which is great, and Silent Payments aren't reliant on OP_Return unlike BIP47.
While it might not be perfect, the chance of which I'll be switching to Bitcoin Knots from Bitcoin Core is increasing.
You can already store up to 4MB in witness data.
Yup, though the purpose of witness, afaik, is for signing and financial related data for effeciency, not for arbitrary like op return, though arbitrary data can be stored in witness, and with that said, knots may have default filters as well to include transactions with witness but not ones with non-transaction-purposed data (which I think they're doing but I'm not sure). I'd agree with this approach as well.