You are running a 2013 Macbook Pro; there is no clear benefit for you buying a Macbook from 2020 with or without ARM at all.
Its absolutly unreasonable, if you are already running your Macbook from 2013, that the ARM will give YOU anything relevant extra as the general upgrade from a 7 year old device.
Plus all the other niceties, like USB-3, modern bluetooth, better integrated graphics, a faster and bigger SSD, more RAM, and so on.
Oh, and the ability to run future-proof on the ARM version of Big Sur (and run iOS apps, and other things).
It's not even comparable...
If someone with a Device from 2013, really waits for the ARM Version of a Mac Book, that person will not have any advantage to a normal intel cpu based Mac Book because EVERY device which is 7 years younger is so much faster anyway.
Working on my hobby AppleTV app is doable on the 2013 laptop, it’s just annoyingly slow. I would hope that the ARM perform better.
Please don't downvote, I'm just curious.