Companies are constantly spying on everyone, and then 3 years later they decide to sunset the products we like forcing people to either go without security updates or buy another device.

In contrast, open source projects don't spy on people, and it's transparent so third parties can verify that. People aren't building open source technology to con you into buying more of their stuff. Open source projects will live on as long as there is community interest. Even if a company or even the founder decides they don't want to work on a project anymore, others can pick it up and carry it forward.