Yes, you nailed it with "the deviations only make it more strict" - that's why I think that it's reasonable. I believe that, in general, when your implementati

Yes, you nailed it with "the deviations only make it more strict" - that's why I think that it's reasonable. I believe that, in general, when your implementation is deviating from a spec, you should have a good reason to do so, so you don't end up multiplying incompatible implementations - so you should at least think about why you're incompatible. I just think that this is a good reason.