Is there a downside to using
split inside every equation, even for single equations? One simple test I did produced identical outputs for a single line equation.
I would prefer this since it effectively means less typing and a cleaner "code".
(Less typing because I would define
\be to begin both environments and
\ee to end both environments.)
And I mean downsides apart from the small downside that any personal macro has, that possible collaborators will need to match conventions. I also imagine this increases the compilation time, but I think by a negligible amount.