Can a cordless stick vacuum replace a full-size upright?

Across the reviewers we read, the consensus is nuanced: cordless sticks excel at quick, frequent cleanups and hard floors, but specialist communities repeatedly caution that battery vacuums lack the sustained power and runtime of corded uprights for whole-home deep carpet cleaning. The Dyson V15 comes closest per high-trust testing, while budget models are best treated as convenient secondary vacuums.