It's served me very well! Such a reliable device! Keeps chugging along quite well years later. I wanted a tablet and I wanted a portable laptop at the time. I thought I'd use it a lot more as a tablet than I have. But literally every time I use it, it is as a laptop lol. Perhaps solely down to my laziness of not removing the damn keyboard lol.I still think it's a great device and use the Surface Pro 4 almost daily.
I could happily continue with it but I suspect I am going to replace it with a Galaxy Tab S6 now, and actually use that as a tablet hopefully with the option of having the keyboard. I have a laptop so the surface pro literally lives in my work bag mostly for if I ever need to do something ad hoc.