Re: [PATCH v1 12/19] Documentation/config: add splitIndex.maxPercentChange

Christian Couder [off-list ref] writes:

I think it is easier for user to be able to just set core.splitIndex
to true to enable split-index.

You can have that exact benefit by making core.splitIndex to
bool-or-more.  If your default is 20%, take 'true' as if the user
specified 20% and take 'false' as if the user specified 100% (or is
it 0%?  I do not care about the details but you get the point).