Diablo general manager Rod Fergusson says you'll likely see more Public Test Realms in Diablo 4, but it isn't guaranteed to be a fixture of every season.
Diablo 4 just recently introduced a Public Test Realm for the very first time, nearly a year after launch, as a way of testing out a substantial item rework before it launched as part of Season 4. In a recent interview with Windows Central, Fergusson is asked whether players can expect more PTR sessions for future seasons.
