I have a very similar use case to you, and when I built my PC I just never installed Windows on it. Linux is a great development environment (imo strictly superior to Windows but ymmv), and gaming is almost flawless with Proton. Only problems with that has been from the immature RX 9070 XT drivers, so not too bad.

Depending on what you program with I’d highly recommend exclusively using a Linux VM for it. Then you can fully switch once you’re comfortable working out the kinks.

I think so, and it might even be a feature of the upstream Microsoft OSS Pyright, so even that version should(?) have those features available

BasedPyright should have you covered on the Python end, the downside is you also need to install the PyPi package.

Have used it and it’s excellent, even has additional features over Pylance