I had the first five generations of Surface Pros. I agree that they can be your main computer. They have compromises but overall they work fine. For example, they don't have the computational power as the top end MacBook Pros but they are extremely portable and have a touch screen. I eventually went back to MacOS for work. My Macbook Pro is a great companion to my iPad Pro. I use both 50/50 depending on the scenario. For travel, I can leave the Macbook and access it if I need to via Jump on the iPad. Otherwise, everything is in the cloud either Apple's or Google's and the iPad works just fine. The major win for the iPad is battery life and note taking abilities in meetings. The new iPad keyboard with trackpad is a no brainer upgrade for me.

Also, Sidecar works amazingly well. I have found myself using the iPad as a second monitor more and more often. It is seamless and hasn't crashed yet. I recently took both Macbook and iPad on a trip and was loving the second screen. And for Logic Pro X, the iPad can act as a remote to control instruments or settings with indiscernible latency.