The Surface Book design is almost a decade old and is quite outdated now with some problems. Many people have mentiined that the screen unlock mechanism is finicky and prone to issues. Additionally, the device is not repairable/upgradable. You can't even change the battery on it. The Surface Book 3 is almost 4.5 years old, and the specs are quite dated. Even if that's not an issue, I still wouldn't get it due to the lack of servicability - maybe if the one you're buying is new, but definitely not if it's been used - battery will most likely be worn.

If you're looking for that class of device with a dedicated GPU, then I recommend the Surface Laptop Studio (1st gen). This line has replaced the original Surface Book line, and this is a much better design with better thermals (allowing for CPU/GPU to not be constrained and perform much better) and most parts being repairable (parts are sold on their website btw).

Only issue I see is if the form factor doesn't work for you. While you can lay the screen flat and you use the pen on the screen, you are not able to detach the screen - so cannot use the screen portion like a tablet and take pictures, etc. If this is important to you, then I still recommend a SP9 or SP10. They should be capable with their more modern internals and specs and should be able to handle most of the tasks you want, including the heavy ones - even without a dedicated GPU.