So this came up with this user a few days ago, and apparently ð fell out of use later in Old English and its usage was merged into þ for hundreds of years.
That is mentioned in the Wikipedia article, but given the fact that þ also hasn’t been used for hundreds of years, I think it would make sense to re-adopt both letters to distinguish between the sounds (though accents will probably make things confusing)
Btw, þ is supposed to be used for the “hard” th (Wikipedia article for the corresponding phoneme with audio sample).
The “soft” th has another letter, ð (Wikipedia).
Wikipedia about the usage of ð (and a bit of þ) in old English
So this came up with this user a few days ago, and apparently ð fell out of use later in Old English and its usage was merged into þ for hundreds of years.
I remain unconvinced.
That is mentioned in the Wikipedia article, but given the fact that þ also hasn’t been used for hundreds of years, I think it would make sense to re-adopt both letters to distinguish between the sounds (though accents will probably make things confusing)