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@marijnjh IIUC, in short, @sebmck wants to have control over parser codebase for adding any customizations without monkey-patching.

@rreverser @marijnjh I ended up adding so many extension points that I completely mangled the Acorn codebase.

@rreverser @marijnjh Also may be moving away from ESTree so this gives a lot of additional flexibility.

@sebmck @rreverser @marijnjh that in particular is quite disappointing to hear. basically means ESTree is a failure.

@getify @sebmck @marijnjh That could be said when Shift appeared :) In any case, totally agree - upcoming fragmentation is a very sad thing.

@rreverser @getify @marijnjh Ive heard this a lot but am unaware of some tools even passing around ASTs. I dont really buy the interop story

@sebmck @getify @marijnjh Well, aster did, but apparently I abandoned it too early. More often usecase is devtools that operate on ASTs.

@sebmck @getify @marijnjh With tool-specific API and ASTs you can't reuse various modules from the ecosystem (and there is a lot of them).