Windows is tragic in many respects, but proprietary incentives did speed up computer development early on whereas GPL has slowed things down, and been sidelined, again and again.

Increasingly, corporations are concluding that investing in licenses for other's proprietary software is wasteful and they are seeking out open source software where they can, to avoid lock-in and network effects. So a hundred years from now, that may be the standard view of proprietary software. Long before that I hope we recognize how awkward applying artistic copyright to code is, and grant a four or seven year copyright, but only once the code has been revealed. The purpose of granting intellectual property rights was originally to create public goods, that's just not what's happening with computer code.