I think the iPad and Mac will probably push back against each other in a competition. I think Apple makes their devices in such a way that the iPad is trying to be so good you may not want a Mac and the Mac so good you may not want or need an iPad. I use a Mac at work as my primary machine and the iPad is more of an accessory machine. I know people like you that iPadOS has a ton of benefits over MacOS with its speed, simplify, flexibility etc. For me my 16" MacBook is like a Star Destroyer and my 11" iPad Pro is like an Imperial Shuttlecraft