He was very vocal years back when Microsoft was trying to pull off with UWP - https://www.gamesindustry.biz/articles/2016-03-04-tim-sweene... - That is too much to go in to here, but I would recommend reading about it if you are concerned about being able to do things like load the software you want on to Windows.

Tim Sweeney is thinking years ahead of most other people. In the case of Google and Apple, I suspect what he is actually concerned about is these two companies have control over a VR/AR/XR "metaverse" platform. There are hours of audio and transcripts about him talking about this as well.

https://blog.siggraph.org/2019/10/siggraph-spotlight-episode...

https://www.youtube.com/watch?v=h6ClJxjuRvw