I use WinMerge[1] a lot, and it's always impressed me how it immediately opens to a useable state. So it's absolutely still possible to write Windows software that can open instantly. I think the biggest issue, which multiple other comments have identified, is that people just don't care. Apps open fast enough these days, and no one is pushing back on developers to improve their app's startup performance.
Most hi-res audio is being sold as digital downloads. I don't think there's a currently-sold physical medium that contains digital data that's higher quality than a CD.
I'm not holding my breath, but I really hope Apple works with Microsoft to ensure that Boot Camp still continues to work. Windows on ARM on a MacBook with a powerful A14 sounds like a delight.
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