Yeah if your game is already advanced, you might as well stay on what is working fine on Intel VSCode/Rider. I know it is not optimal but I hear you, getting a new computer one month before the new models comes out… I think Intel is not going away too soon, but I guess like you say, Epic is gonna put more effort on Silicon, one of those things is that you can select Metal 3 for Silicon projects, thing is not showing on Intel projects.
I used to work on a 2019 MPB, with AMD 5300, M1 Pro is somehow in between 5300 and 5600, less heat but, I still think Intel Mac can do a great job. I wonder how are big studios dealing with this, such as The Medium, Layers of Fear, Myst or Stray that is coming soon. Probably modified source code, but I guess time will tell, YES Apple Silicon is the future, but Intel still have some good things to offer, specially on Desktop setups like the MacPro. If you work without autocomplete you are hell of a coder! It is like doing it all in notepad ++.