A big part of Broadcom’s current business model seems to be:

• Buy company that makes an important product/service used by many big companies.
• Squeeze the acquired company for every last drop of short term profit; increasing prices, abandoning products, etc.
• Watch large companies jump ship to other solutions
• Repeat

This is at least a main part of the reason. I use an open source client for GOG on Linux, the only reason why is because they don’t natively support Linux.