The trouble with Dyson constructions (sphere, swarms, rings, - any of them really) is that they require such a massive investment of technology and energy that by the time a particular civilization is able to build one, they've probably already licked the problems that a Dyson Whatever is meant to solve.
Boru
Boru
‘But it does me no injury for my neighbour to say there are twenty gods or no gods. It neither picks my pocket nor breaks my leg.’ - Thomas Jefferson