Could insert-multi! accept sequential instead of vector?

[seancorfield]

Is your feature request related to a problem? Please describe.
Because insert-multi! is spec'd to require vectors (of vectors), you can't use for/map/etc to produce the rows or row values, unless you pour them into vectors.

Describe the solution you'd like
Relax the specs to allow sequential? values instead of vector?.

Additional context
Can other functions accept sequential? instead of vector? -- the ::sql-params spec, for example.