Rebellions in 40k usually happen on a single world, or within a very limited region, and are often isolated before they can spread.In Star Wars, the rebels are far weaker than the Empire, but because hyperdrives are easy to obtain and relatively safe, they can carry out guerrilla tactics. By contrast, the Imperium in 40k doesn’t have a rebel problem as severe as the Galactic Empire did, because warp travel is terrible and can't really do it without a Navigatorso if the Imperium ever figures out a truly safe form of faster-than-light travel, it would face horrific rebel problems all across the galaxy.
The Imperials will simply be able to respond better, in kind. The logistics will be vastly increased across the board.
most rebellions are because of chaos. if the Imperium cuts out Warp travel, that cripples and starves chaos
>>97345238 just regular rebellion I gurss