Most companies are on the cloud now. I just wonder if there are similar companies that are on prem and also share data on their infrastructure like Stack exchan

Most companies are on the cloud now. I just wonder if there are similar companies that are on prem and also share data on their infrastructure like Stack exchange does. Would be interesting if there is at least one. There's a growing call by some to move off the cloud due to how powerful and cheap hardware has gotten. CPU performance in particular has gone up.