Legal Software Suppliers: Are There Any Mainstream Independent Suppliers Left?

Software consolidators buy companies to get economies of scale. For them, the perfect 'utopian position' is to have every customer of every business they've bought transfer to their 'go-forward product’. On top of that, I have yet to come across a software consolidator that didn't have a main go-forward product and an upgrade path for all the other product sets they've purchased.