This dovetails with the case for enterprise open source quite nicely.
We continually make more and more complicated things. The time in which we iterate also decreases. I can see the argument that patents were useful at a time where an iteration could take decades or more. However, I'm sure we're well past the point of usefulness for any patent system.
A lot of decision makers in companies are stuck in the mindset of trade secrets because that made sense at one point. Your company made a widget. Your goal was to make that widget better than the other widget makers. You (at least believed that you) had some breakthrough that made your widgets better and continued to make widgets in that style for years without much change. In that time, you protected how you achieved the breakthrough. Patents helped with this.
Today, a lot of the money is not really in creating widgets. It's in creating digital recreations of widgets (e-widget) that accomplish the same task [0]. You don't pay much overhead per copy of e-widgets, so prototyping and "mass production" is fast and cheap. You can iterate at increasingly faster paces. It is not worth it to you to protect how you differentiate your e-widgets once it comes out [1]. You're already working on the next version. If you spend a lot of resources on protecting how you achieved your previous iteration(s), you are doomed to fall behind [1].
Once a company falls so far behind, it makes more sense (but only in the short term) to double down on your protection efforts. This is how we end up with the cable company ISP situation in the US. It is easier [2] to fight in the legal system than it is to a) spend on the R&D to improve your networks and b) actually roll out those changes.
These are just my observations. I have some ideas on solutions but obviously don't really know what would work. I doubt any one thing would work for every company, but I know (long term) a lot more are either going to need to adapt to a more open mindset or continue to spend more and more to protect their closed mindset. The latter is probably more likely for the foreseeable future.
[0]: Realistically, the real money is in trading investments in potential value of creating digital recreations of widgets, but that's a different conversation. At some point, you usually have to create the widget / digital recreation, so we'll continue to talk about that.
[1]: Unless you're a patent troll.
[2]: Cheaper.