Thanks for responding. Bit tired right now and will be off to bed soon, but will respond to one point that really dovetails with a quibble I have here.
Perhaps I could be generalizing your predictions as applying to technological advancements in general, but I’d think that the “War advanced technology more than peacetime” narrative is compromised by the deaths of so many potential scientists, engineers, technicians, and other innovative professionals during wartime. Ditto with how much money and economic productivity is poured into waging wars rather than R&D ventures, as well as how people’s priorities go from being competitive innovators to rebuilding their rubble-ridden countries, when so much of their infrastructure has been shelled or bombed into oblivion.
If we averted this by butterflying massive or otherwise game-changing conflicts, wartime technology may be neglected. However, I’d also imagine that more potential innovators living, coupled with intact economies and infrastructure allowing people to prioritize innovation more, would see massive strides in civilian advancements. There may also be cases where technologies that had roots in wartime applications are invented under more peaceful, civilian-commissioned circumstances, so I think it’s presumptuous to simply assume that RADAR or what have you couldn’t arise in any scenario other than what happened IOTL, for example (though it may go by a different name, despite essentially being the same thing).