I have a fairly expensive Thinkpad X1 that I bought for myself and cheap MacBook Air M1 series for my kids. The M1 blows the X1 out of the water: faster, better screen, better screen aspect ratio, much better battery life. The only thing the X1 has going for it is a marginally better keyboard.
Well that and Windows. Not starting any OS debates, but would an M1 achieve the same performance and battery life if constantly running Windows in Parallels? If so, then that would put it ahead of the X1.
