Dominion Voting Systems was created because ES&S was forced to sell Premier Election Solutions due to antitrust concerns. ES&S has been subject of various errors and controversies:

https://www.propublica.org/article/the-market-for-voting-mac... https://en.wikipedia.org/wiki/en/Election_Systems_&_Software https://www.nbcnews.com/news/all/chinese-parts-hidden-owners...

I also recall seeing liberal concern over Dominion in GA prior to the election. Regardless, it's a powerful industry with a justifiably large amount of public scrutiny, even if we don't always get the transparency we deserve. All of these systems should be public, open source, and verifiable with paper trails.